sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99         SCTP_INP_INFO_RUNLOCK();
 100 }
 101
 102 /*-
 103  * Addresses are added to VRF's (Virtual Router's). For BSD we
 104  * have only the default VRF 0. We maintain a hash list of
 105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 106  * these has a list of addresses. When we add a new address
 107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 108  * not exist we create it and add it to the list of IFN's
 109  * within the VRF. Once we have the sctp_ifn, we add the
 110  * address to the list. So we look something like:
 111  *
 112  * hash-vrf-table
 113  *   vrf-> ifn-> ifn -> ifn
 114  *   vrf    |
 115  *    ...   +--ifa-> ifa -> ifa
 116  *   vrf
 117  *
 118  * We keep these separate lists since the SCTP subsystem will
 119  * point to these from its source address selection nets structure.
 120  * When an address is deleted it does not happen right away on
 121  * the SCTP side, it gets scheduled. What we do when a
 122  * delete happens is immediately remove the address from
 123  * the master list and decrement the refcount. As our
 124  * addip iterator works through and frees the src address
 125  * selection pointing to the sctp_ifa, eventually the refcount
 126  * will reach 0 and we will delete it. Note that it is assumed
 127  * that any locking on system level ifn/ifa is done at the
 128  * caller of these functions and these routines will only
 129  * lock the SCTP structures as they add or delete things.
 130  *
 131  * Other notes on VRF concepts.
 132  *  - An endpoint can be in multiple VRF's
 133  *  - An association lives within a VRF and only one VRF.
 134  *  - Any incoming packet we can deduce the VRF for by
 135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 136  *  - Any downward send call or connect call must supply the
 137  *    VRF via ancillary data or via some sort of set default
 138  *    VRF socket option call (again for BSD no brainer since
 139  *    the VRF is always 0).
 140  *  - An endpoint may add multiple VRF's to it.
 141  *  - Listening sockets can accept associations in any
 142  *    of the VRF's they are in but the assoc will end up
 143  *    in only one VRF (gotten from the packet or connect/send).
 144  *
 145  */
 146
 147 struct sctp_vrf *
 148 sctp_allocate_vrf(int vrf_id)
 149 {
 150         struct sctp_vrf *vrf = NULL;
 151         struct sctp_vrflist *bucket;
 152
 153         /* First allocate the VRF structure */
 154         vrf = sctp_find_vrf(vrf_id);
 155         if (vrf) {
 156                 /* Already allocated */
 157                 return (vrf);
 158         }
 159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 160             SCTP_M_VRF);
 161         if (vrf == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrf_id);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* setup the VRF */
 169         memset(vrf, 0, sizeof(struct sctp_vrf));
 170         vrf->vrf_id = vrf_id;
 171         LIST_INIT(&vrf->ifnlist);
 172         vrf->total_ifa_count = 0;
 173         vrf->refcount = 0;
 174         /* now also setup table ids */
 175         SCTP_INIT_VRF_TABLEID(vrf);
 176         /* Init the HASH of addresses */
 177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 178             &vrf->vrf_addr_hashmark);
 179         if (vrf->vrf_addr_hash == NULL) {
 180                 /* No memory */
 181 #ifdef INVARIANTS
 182                 panic("No memory for VRF:%d", vrf_id);
 183 #endif
 184                 SCTP_FREE(vrf, SCTP_M_VRF);
 185                 return (NULL);
 186         }
 187         /* Add it to the hash table */
 188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 191         return (vrf);
 192 }
 193
 194
 195 struct sctp_ifn *
 196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 197 {
 198         struct sctp_ifn *sctp_ifnp;
 199         struct sctp_ifnlist *hash_ifn_head;
 200
 201         /*
 202          * We assume the lock is held for the addresses if that's wrong
 203          * problems could occur :-)
 204          */
 205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 207                 if (sctp_ifnp->ifn_index == ifn_index) {
 208                         return (sctp_ifnp);
 209                 }
 210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 211                         return (sctp_ifnp);
 212                 }
 213         }
 214         return (NULL);
 215 }
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233
 234 void
 235 sctp_free_vrf(struct sctp_vrf *vrf)
 236 {
 237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 238                 if (vrf->vrf_addr_hash) {
 239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 240                         vrf->vrf_addr_hash = NULL;
 241                 }
 242                 /* We zero'd the count */
 243                 LIST_REMOVE(vrf, next_vrf);
 244                 SCTP_FREE(vrf, SCTP_M_VRF);
 245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 246         }
 247 }
 248
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263
 264 void
 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 266 {
 267         struct sctp_ifn *sctp_ifnp;
 268
 269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 270         if (sctp_ifnp != NULL) {
 271                 sctp_ifnp->ifn_mtu = mtu;
 272         }
 273 }
 274
 275
 276 void
 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 278 {
 279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 280                 /* We zero'd the count */
 281                 if (sctp_ifap->ifn_p) {
 282                         sctp_free_ifn(sctp_ifap->ifn_p);
 283                 }
 284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 286         }
 287 }
 288
 289
 290 static void
 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 292 {
 293         struct sctp_ifn *found;
 294
 295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 296         if (found == NULL) {
 297                 /* Not in the list.. sorry */
 298                 return;
 299         }
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WLOCK();
 302         LIST_REMOVE(sctp_ifnp, next_bucket);
 303         LIST_REMOVE(sctp_ifnp, next_ifn);
 304         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 305             sctp_ifnp->registered_af);
 306         if (hold_addr_lock == 0)
 307                 SCTP_IPI_ADDR_WUNLOCK();
 308         /* Take away the reference, and possibly free it */
 309         sctp_free_ifn(sctp_ifnp);
 310 }
 311
 312
 313 void
 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 315     const char *if_name, uint32_t ifn_index)
 316 {
 317         struct sctp_vrf *vrf;
 318         struct sctp_ifa *sctp_ifap;
 319
 320         SCTP_IPI_ADDR_RLOCK();
 321         vrf = sctp_find_vrf(vrf_id);
 322         if (vrf == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 324                 goto out;
 325
 326         }
 327         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 328         if (sctp_ifap == NULL) {
 329                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 330                 goto out;
 331         }
 332         if (sctp_ifap->ifn_p == NULL) {
 333                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 334                 goto out;
 335         }
 336         if (if_name) {
 337                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 338                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 339                             sctp_ifap->ifn_p->ifn_name, if_name);
 340                         goto out;
 341                 }
 342         } else {
 343                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 345                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 346                         goto out;
 347                 }
 348         }
 349
 350         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 351         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 352 out:
 353         SCTP_IPI_ADDR_RUNLOCK();
 354 }
 355
 356
 357 void
 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 359     const char *if_name, uint32_t ifn_index)
 360 {
 361         struct sctp_vrf *vrf;
 362         struct sctp_ifa *sctp_ifap;
 363
 364         SCTP_IPI_ADDR_RLOCK();
 365         vrf = sctp_find_vrf(vrf_id);
 366         if (vrf == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 368                 goto out;
 369
 370         }
 371         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 372         if (sctp_ifap == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 374                 goto out;
 375         }
 376         if (sctp_ifap->ifn_p == NULL) {
 377                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 378                 goto out;
 379         }
 380         if (if_name) {
 381                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 383                             sctp_ifap->ifn_p->ifn_name, if_name);
 384                         goto out;
 385                 }
 386         } else {
 387                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 389                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 390                         goto out;
 391                 }
 392         }
 393
 394         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 395         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 396 out:
 397         SCTP_IPI_ADDR_RUNLOCK();
 398 }
 399
 400
 401 /*-
 402  * Add an ifa to an ifn.
 403  * Register the interface as necessary.
 404  * NOTE: ADDR write lock MUST be held.
 405  */
 406 static void
 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 408 {
 409         int ifa_af;
 410
 411         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 412         sctp_ifap->ifn_p = sctp_ifnp;
 413         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 414         /* update address counts */
 415         sctp_ifnp->ifa_count++;
 416         ifa_af = sctp_ifap->address.sa.sa_family;
 417         switch (ifa_af) {
 418 #ifdef INET
 419         case AF_INET:
 420                 sctp_ifnp->num_v4++;
 421                 break;
 422 #endif
 423 #ifdef INET6
 424         case AF_INET6:
 425                 sctp_ifnp->num_v6++;
 426                 break;
 427 #endif
 428         default:
 429                 break;
 430         }
 431         if (sctp_ifnp->ifa_count == 1) {
 432                 /* register the new interface */
 433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 436 }
 437
 438
 439 /*-
 440  * Remove an ifa from its ifn.
 441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 442  * the interface based on the remaining address families left.
 443  * NOTE: ADDR write lock MUST be held.
 444  */
 445 static void
 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 447 {
 448         LIST_REMOVE(sctp_ifap, next_ifa);
 449         if (sctp_ifap->ifn_p) {
 450                 /* update address counts */
 451                 sctp_ifap->ifn_p->ifa_count--;
 452                 switch (sctp_ifap->address.sa.sa_family) {
 453 #ifdef INET
 454                 case AF_INET:
 455                         sctp_ifap->ifn_p->num_v4--;
 456                         break;
 457 #endif
 458 #ifdef INET6
 459                 case AF_INET6:
 460                         sctp_ifap->ifn_p->num_v6--;
 461                         break;
 462 #endif
 463                 default:
 464                         break;
 465                 }
 466
 467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 468                         /* remove the ifn, possibly freeing it */
 469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 470                 } else {
 471                         /* re-register address family type, if needed */
 472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 474                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 475                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 476                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 477                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 478                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 479                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 480                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 481                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 482                         }
 483                         /* free the ifn refcount */
 484                         sctp_free_ifn(sctp_ifap->ifn_p);
 485                 }
 486                 sctp_ifap->ifn_p = NULL;
 487         }
 488 }
 489
 490
 491 struct sctp_ifa *
 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 493     uint32_t ifn_type, const char *if_name, void *ifa,
 494     struct sockaddr *addr, uint32_t ifa_flags,
 495     int dynamic_add)
 496 {
 497         struct sctp_vrf *vrf;
 498         struct sctp_ifn *sctp_ifnp = NULL;
 499         struct sctp_ifa *sctp_ifap = NULL;
 500         struct sctp_ifalist *hash_addr_head;
 501         struct sctp_ifnlist *hash_ifn_head;
 502         uint32_t hash_of_addr;
 503         int new_ifn_af = 0;
 504
 505 #ifdef SCTP_DEBUG
 506         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 507         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 508 #endif
 509         SCTP_IPI_ADDR_WLOCK();
 510         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 511         if (sctp_ifnp) {
 512                 vrf = sctp_ifnp->vrf;
 513         } else {
 514                 vrf = sctp_find_vrf(vrf_id);
 515                 if (vrf == NULL) {
 516                         vrf = sctp_allocate_vrf(vrf_id);
 517                         if (vrf == NULL) {
 518                                 SCTP_IPI_ADDR_WUNLOCK();
 519                                 return (NULL);
 520                         }
 521                 }
 522         }
 523         if (sctp_ifnp == NULL) {
 524                 /*
 525                  * build one and add it, can't hold lock until after malloc
 526                  * done though.
 527                  */
 528                 SCTP_IPI_ADDR_WUNLOCK();
 529                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 530                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 531                 if (sctp_ifnp == NULL) {
 532 #ifdef INVARIANTS
 533                         panic("No memory for IFN");
 534 #endif
 535                         return (NULL);
 536                 }
 537                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 538                 sctp_ifnp->ifn_index = ifn_index;
 539                 sctp_ifnp->ifn_p = ifn;
 540                 sctp_ifnp->ifn_type = ifn_type;
 541                 sctp_ifnp->refcount = 0;
 542                 sctp_ifnp->vrf = vrf;
 543                 atomic_add_int(&vrf->refcount, 1);
 544                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 545                 if (if_name != NULL) {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 547                 } else {
 548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 549                 }
 550                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 551                 LIST_INIT(&sctp_ifnp->ifalist);
 552                 SCTP_IPI_ADDR_WLOCK();
 553                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 554                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 555                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 556                 new_ifn_af = 1;
 557         }
 558         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 559         if (sctp_ifap) {
 560                 /* Hmm, it already exists? */
 561                 if ((sctp_ifap->ifn_p) &&
 562                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 563                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 564                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 565                             (void *)sctp_ifap);
 566                         if (new_ifn_af) {
 567                                 /* Remove the created one that we don't want */
 568                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 569                         }
 570                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 571                                 /* easy to solve, just switch back to active */
 572                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 573                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 574                                 sctp_ifap->ifn_p = sctp_ifnp;
 575                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 576                         }
 577         exit_stage_left:
 578                         SCTP_IPI_ADDR_WUNLOCK();
 579                         return (sctp_ifap);
 580                 } else {
 581                         if (sctp_ifap->ifn_p) {
 582                                 /*
 583                                  * The last IFN gets the address, remove the
 584                                  * old one
 585                                  */
 586                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 587                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 588                                     sctp_ifap->ifn_p->ifn_index, if_name,
 589                                     ifn_index);
 590                                 /* remove the address from the old ifn */
 591                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 592                                 /* move the address over to the new ifn */
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                                 goto exit_stage_left;
 595                         } else {
 596                                 /* repair ifnp which was NULL ? */
 597                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 598                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 599                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 600                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 601                         }
 602                         goto exit_stage_left;
 603                 }
 604         }
 605         SCTP_IPI_ADDR_WUNLOCK();
 606         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 607         if (sctp_ifap == NULL) {
 608 #ifdef INVARIANTS
 609                 panic("No memory for IFA");
 610 #endif
 611                 return (NULL);
 612         }
 613         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 614         sctp_ifap->ifn_p = sctp_ifnp;
 615         atomic_add_int(&sctp_ifnp->refcount, 1);
 616         sctp_ifap->vrf_id = vrf_id;
 617         sctp_ifap->ifa = ifa;
 618         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 619         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 620         sctp_ifap->flags = ifa_flags;
 621         /* Set scope */
 622         switch (sctp_ifap->address.sa.sa_family) {
 623 #ifdef INET
 624         case AF_INET:
 625                 {
 626                         struct sockaddr_in *sin;
 627
 628                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 629                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 630                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 631                                 sctp_ifap->src_is_loop = 1;
 632                         }
 633                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 634                                 sctp_ifap->src_is_priv = 1;
 635                         }
 636                         sctp_ifnp->num_v4++;
 637                         if (new_ifn_af)
 638                                 new_ifn_af = AF_INET;
 639                         break;
 640                 }
 641 #endif
 642 #ifdef INET6
 643         case AF_INET6:
 644                 {
 645                         /* ok to use deprecated addresses? */
 646                         struct sockaddr_in6 *sin6;
 647
 648                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 649                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 650                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 651                                 sctp_ifap->src_is_loop = 1;
 652                         }
 653                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 654                                 sctp_ifap->src_is_priv = 1;
 655                         }
 656                         sctp_ifnp->num_v6++;
 657                         if (new_ifn_af)
 658                                 new_ifn_af = AF_INET6;
 659                         break;
 660                 }
 661 #endif
 662         default:
 663                 new_ifn_af = 0;
 664                 break;
 665         }
 666         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 667
 668         if ((sctp_ifap->src_is_priv == 0) &&
 669             (sctp_ifap->src_is_loop == 0)) {
 670                 sctp_ifap->src_is_glob = 1;
 671         }
 672         SCTP_IPI_ADDR_WLOCK();
 673         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 674         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 675         sctp_ifap->refcount = 1;
 676         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 677         sctp_ifnp->ifa_count++;
 678         vrf->total_ifa_count++;
 679         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 680         if (new_ifn_af) {
 681                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 682                 sctp_ifnp->registered_af = new_ifn_af;
 683         }
 684         SCTP_IPI_ADDR_WUNLOCK();
 685         if (dynamic_add) {
 686                 /*
 687                  * Bump up the refcount so that when the timer completes it
 688                  * will drop back down.
 689                  */
 690                 struct sctp_laddr *wi;
 691
 692                 atomic_add_int(&sctp_ifap->refcount, 1);
 693                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 694                 if (wi == NULL) {
 695                         /*
 696                          * Gak, what can we do? We have lost an address
 697                          * change can you say HOSED?
 698                          */
 699                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 700                         /* Opps, must decrement the count */
 701                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 702                             if_name);
 703                         return (NULL);
 704                 }
 705                 SCTP_INCR_LADDR_COUNT();
 706                 bzero(wi, sizeof(*wi));
 707                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 708                 wi->ifa = sctp_ifap;
 709                 wi->action = SCTP_ADD_IP_ADDRESS;
 710
 711                 SCTP_WQ_ADDR_LOCK();
 712                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 713                 SCTP_WQ_ADDR_UNLOCK();
 714
 715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 716                     (struct sctp_inpcb *)NULL,
 717                     (struct sctp_tcb *)NULL,
 718                     (struct sctp_nets *)NULL);
 719         } else {
 720                 /* it's ready for use */
 721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 722         }
 723         return (sctp_ifap);
 724 }
 725
 726 void
 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 728     uint32_t ifn_index, const char *if_name)
 729 {
 730         struct sctp_vrf *vrf;
 731         struct sctp_ifa *sctp_ifap = NULL;
 732
 733         SCTP_IPI_ADDR_WLOCK();
 734         vrf = sctp_find_vrf(vrf_id);
 735         if (vrf == NULL) {
 736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 737                 goto out_now;
 738         }
 739 #ifdef SCTP_DEBUG
 740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 742 #endif
 743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 744         if (sctp_ifap) {
 745                 /* Validate the delete */
 746                 if (sctp_ifap->ifn_p) {
 747                         int valid = 0;
 748
 749                         /*-
 750                          * The name has priority over the ifn_index
 751                          * if its given. We do this especially for
 752                          * panda who might recycle indexes fast.
 753                          */
 754                         if (if_name) {
 755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 756                                         /* They match its a correct delete */
 757                                         valid = 1;
 758                                 }
 759                         }
 760                         if (!valid) {
 761                                 /* last ditch check ifn_index */
 762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 763                                         valid = 1;
 764                                 }
 765                         }
 766                         if (!valid) {
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 771                                 SCTP_IPI_ADDR_WUNLOCK();
 772                                 return;
 773                         }
 774                 }
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 777                 /*
 778                  * We don't set the flag. This means that the structure will
 779                  * hang around in EP's that have bound specific to it until
 780                  * they close. This gives us TCP like behavior if someone
 781                  * removes an address (or for that matter adds it right
 782                  * back).
 783                  */
 784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 785                 vrf->total_ifa_count--;
 786                 LIST_REMOVE(sctp_ifap, next_bucket);
 787                 sctp_remove_ifa_from_ifn(sctp_ifap);
 788         }
 789 #ifdef SCTP_DEBUG
 790         else {
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 792                     ifn_index);
 793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 794         }
 795 #endif
 796
 797 out_now:
 798         SCTP_IPI_ADDR_WUNLOCK();
 799         if (sctp_ifap) {
 800                 struct sctp_laddr *wi;
 801
 802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 803                 if (wi == NULL) {
 804                         /*
 805                          * Gak, what can we do? We have lost an address
 806                          * change can you say HOSED?
 807                          */
 808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 809
 810                         /* Oops, must decrement the count */
 811                         sctp_free_ifa(sctp_ifap);
 812                         return;
 813                 }
 814                 SCTP_INCR_LADDR_COUNT();
 815                 bzero(wi, sizeof(*wi));
 816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 817                 wi->ifa = sctp_ifap;
 818                 wi->action = SCTP_DEL_IP_ADDRESS;
 819                 SCTP_WQ_ADDR_LOCK();
 820                 /*
 821                  * Should this really be a tailq? As it is we will process
 822                  * the newest first :-0
 823                  */
 824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 825                 SCTP_WQ_ADDR_UNLOCK();
 826
 827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 828                     (struct sctp_inpcb *)NULL,
 829                     (struct sctp_tcb *)NULL,
 830                     (struct sctp_nets *)NULL);
 831         }
 832         return;
 833 }
 834
 835
 836 static int
 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 838 {
 839         int loopback_scope;
 840
 841 #if defined(INET)
 842         int ipv4_local_scope, ipv4_addr_legal;
 843
 844 #endif
 845 #if defined(INET6)
 846         int local_scope, site_scope, ipv6_addr_legal;
 847
 848 #endif
 849         struct sctp_vrf *vrf;
 850         struct sctp_ifn *sctp_ifn;
 851         struct sctp_ifa *sctp_ifa;
 852
 853         loopback_scope = stcb->asoc.scope.loopback_scope;
 854 #if defined(INET)
 855         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 856         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 857 #endif
 858 #if defined(INET6)
 859         local_scope = stcb->asoc.scope.local_scope;
 860         site_scope = stcb->asoc.scope.site_scope;
 861         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 862 #endif
 863
 864         SCTP_IPI_ADDR_RLOCK();
 865         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 866         if (vrf == NULL) {
 867                 /* no vrf, no addresses */
 868                 SCTP_IPI_ADDR_RUNLOCK();
 869                 return (0);
 870         }
 871         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 872                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 873                         if ((loopback_scope == 0) &&
 874                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 875                                 continue;
 876                         }
 877                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 878                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 879                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 880                                         /*
 881                                          * We allow pending addresses, where
 882                                          * we have sent an asconf-add to be
 883                                          * considered valid.
 884                                          */
 885                                         continue;
 886                                 }
 887                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 888                                         continue;
 889                                 }
 890                                 switch (sctp_ifa->address.sa.sa_family) {
 891 #ifdef INET
 892                                 case AF_INET:
 893                                         if (ipv4_addr_legal) {
 894                                                 struct sockaddr_in *sin,
 895                                                            *rsin;
 896
 897                                                 sin = &sctp_ifa->address.sin;
 898                                                 rsin = (struct sockaddr_in *)to;
 899                                                 if ((ipv4_local_scope == 0) &&
 900                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 901                                                         continue;
 902                                                 }
 903                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 904                                                     &sin->sin_addr) != 0) {
 905                                                         continue;
 906                                                 }
 907                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 908                                                         SCTP_IPI_ADDR_RUNLOCK();
 909                                                         return (1);
 910                                                 }
 911                                         }
 912                                         break;
 913 #endif
 914 #ifdef INET6
 915                                 case AF_INET6:
 916                                         if (ipv6_addr_legal) {
 917                                                 struct sockaddr_in6 *sin6,
 918                                                             *rsin6;
 919
 920                                                 sin6 = &sctp_ifa->address.sin6;
 921                                                 rsin6 = (struct sockaddr_in6 *)to;
 922                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 923                                                     &sin6->sin6_addr) != 0) {
 924                                                         continue;
 925                                                 }
 926                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 927                                                         if (local_scope == 0)
 928                                                                 continue;
 929                                                         if (sin6->sin6_scope_id == 0) {
 930                                                                 if (sa6_recoverscope(sin6) != 0)
 931                                                                         continue;
 932                                                         }
 933                                                 }
 934                                                 if ((site_scope == 0) &&
 935                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 936                                                         continue;
 937                                                 }
 938                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 939                                                         SCTP_IPI_ADDR_RUNLOCK();
 940                                                         return (1);
 941                                                 }
 942                                         }
 943                                         break;
 944 #endif
 945                                 default:
 946                                         /* TSNH */
 947                                         break;
 948                                 }
 949                         }
 950                 }
 951         } else {
 952                 struct sctp_laddr *laddr;
 953
 954                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 955                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 956                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 957                                 continue;
 958                         }
 959                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 960                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 961                                 /*
 962                                  * We allow pending addresses, where we have
 963                                  * sent an asconf-add to be considered
 964                                  * valid.
 965                                  */
 966                                 continue;
 967                         }
 968                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 969                                 continue;
 970                         }
 971                         switch (to->sa_family) {
 972 #ifdef INET
 973                         case AF_INET:
 974                                 {
 975                                         struct sockaddr_in *sin, *rsin;
 976
 977                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
 978                                         rsin = (struct sockaddr_in *)to;
 979                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 980                                                 SCTP_IPI_ADDR_RUNLOCK();
 981                                                 return (1);
 982                                         }
 983                                         break;
 984                                 }
 985 #endif
 986 #ifdef INET6
 987                         case AF_INET6:
 988                                 {
 989                                         struct sockaddr_in6 *sin6, *rsin6;
 990
 991                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
 992                                         rsin6 = (struct sockaddr_in6 *)to;
 993                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 994                                                 SCTP_IPI_ADDR_RUNLOCK();
 995                                                 return (1);
 996                                         }
 997                                         break;
 998                                 }
 999
1000 #endif
1001                         default:
1002                                 /* TSNH */
1003                                 break;
1004                         }
1005
1006                 }
1007         }
1008         SCTP_IPI_ADDR_RUNLOCK();
1009         return (0);
1010 }
1011
1012
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018         /*
1019          * If we support the TCP model, then we must now dig through to see
1020          * if we can find our endpoint in the list of tcp ep's.
1021          */
1022         uint16_t lport, rport;
1023         struct sctppcbhead *ephead;
1024         struct sctp_inpcb *inp;
1025         struct sctp_laddr *laddr;
1026         struct sctp_tcb *stcb;
1027         struct sctp_nets *net;
1028
1029         if ((to == NULL) || (from == NULL)) {
1030                 return (NULL);
1031         }
1032         switch (to->sa_family) {
1033 #ifdef INET
1034         case AF_INET:
1035                 if (from->sa_family == AF_INET) {
1036                         lport = ((struct sockaddr_in *)to)->sin_port;
1037                         rport = ((struct sockaddr_in *)from)->sin_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043 #ifdef INET6
1044         case AF_INET6:
1045                 if (from->sa_family == AF_INET6) {
1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048                 } else {
1049                         return (NULL);
1050                 }
1051                 break;
1052 #endif
1053         default:
1054                 return (NULL);
1055         }
1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057         /*
1058          * Ok now for each of the guys in this bucket we must look and see:
1059          * - Does the remote port match. - Does there single association's
1060          * addresses match this address (to). If so we update p_ep to point
1061          * to this ep and return the tcb from it.
1062          */
1063         LIST_FOREACH(inp, ephead, sctp_hash) {
1064                 SCTP_INP_RLOCK(inp);
1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 if (lport != inp->sctp_lport) {
1070                         SCTP_INP_RUNLOCK(inp);
1071                         continue;
1072                 }
1073                 switch (to->sa_family) {
1074 #ifdef INET
1075                 case AF_INET:
1076                         {
1077                                 struct sockaddr_in *sin;
1078
1079                                 sin = (struct sockaddr_in *)to;
1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081                                     &sin->sin_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088 #ifdef INET6
1089                 case AF_INET6:
1090                         {
1091                                 struct sockaddr_in6 *sin6;
1092
1093                                 sin6 = (struct sockaddr_in6 *)to;
1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095                                     &sin6->sin6_addr) != 0) {
1096                                         SCTP_INP_RUNLOCK(inp);
1097                                         continue;
1098                                 }
1099                                 break;
1100                         }
1101 #endif
1102                 default:
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 if (inp->def_vrf_id != vrf_id) {
1107                         SCTP_INP_RUNLOCK(inp);
1108                         continue;
1109                 }
1110                 /* check to see if the ep has one of the addresses */
1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112                         /* We are NOT bound all, so look further */
1113                         int match = 0;
1114
1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117                                 if (laddr->ifa == NULL) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 if (head == NULL) {
1445                         goto null_return;
1446                 }
1447                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1448                         if (stcb->rport != rport) {
1449                                 /* remote port does not match */
1450                                 continue;
1451                         }
1452                         SCTP_TCB_LOCK(stcb);
1453                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1454                                 SCTP_TCB_UNLOCK(stcb);
1455                                 continue;
1456                         }
1457                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1458                                 SCTP_TCB_UNLOCK(stcb);
1459                                 continue;
1460                         }
1461                         /* now look at the list of remote addresses */
1462                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1463 #ifdef INVARIANTS
1464                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1465                                         panic("Corrupt net list");
1466                                 }
1467 #endif
1468                                 if (net->ro._l_addr.sa.sa_family !=
1469                                     remote->sa_family) {
1470                                         /* not the same family */
1471                                         continue;
1472                                 }
1473                                 switch (remote->sa_family) {
1474 #ifdef INET
1475                                 case AF_INET:
1476                                         {
1477                                                 struct sockaddr_in *sin,
1478                                                            *rsin;
1479
1480                                                 sin = (struct sockaddr_in *)
1481                                                     &net->ro._l_addr;
1482                                                 rsin = (struct sockaddr_in *)remote;
1483                                                 if (sin->sin_addr.s_addr ==
1484                                                     rsin->sin_addr.s_addr) {
1485                                                         /* found it */
1486                                                         if (netp != NULL) {
1487                                                                 *netp = net;
1488                                                         }
1489                                                         if (locked_tcb == NULL) {
1490                                                                 SCTP_INP_DECR_REF(inp);
1491                                                         } else if (locked_tcb != stcb) {
1492                                                                 SCTP_TCB_LOCK(locked_tcb);
1493                                                         }
1494                                                         if (locked_tcb) {
1495                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1496                                                         }
1497                                                         SCTP_INP_WUNLOCK(inp);
1498                                                         SCTP_INP_INFO_RUNLOCK();
1499                                                         return (stcb);
1500                                                 }
1501                                                 break;
1502                                         }
1503 #endif
1504 #ifdef INET6
1505                                 case AF_INET6:
1506                                         {
1507                                                 struct sockaddr_in6 *sin6,
1508                                                             *rsin6;
1509
1510                                                 sin6 = (struct sockaddr_in6 *)
1511                                                     &net->ro._l_addr;
1512                                                 rsin6 = (struct sockaddr_in6 *)remote;
1513                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1514                                                     rsin6)) {
1515                                                         /* found it */
1516                                                         if (netp != NULL) {
1517                                                                 *netp = net;
1518                                                         }
1519                                                         if (locked_tcb == NULL) {
1520                                                                 SCTP_INP_DECR_REF(inp);
1521                                                         } else if (locked_tcb != stcb) {
1522                                                                 SCTP_TCB_LOCK(locked_tcb);
1523                                                         }
1524                                                         if (locked_tcb) {
1525                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1526                                                         }
1527                                                         SCTP_INP_WUNLOCK(inp);
1528                                                         SCTP_INP_INFO_RUNLOCK();
1529                                                         return (stcb);
1530                                                 }
1531                                                 break;
1532                                         }
1533 #endif
1534                                 default:
1535                                         /* TSNH */
1536                                         break;
1537                                 }
1538                         }
1539                         SCTP_TCB_UNLOCK(stcb);
1540                 }
1541         }
1542 null_return:
1543         /* clean up for returning null */
1544         if (locked_tcb) {
1545                 SCTP_TCB_LOCK(locked_tcb);
1546                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1547         }
1548         SCTP_INP_WUNLOCK(inp);
1549         SCTP_INP_INFO_RUNLOCK();
1550         /* not found */
1551         return (NULL);
1552 }
1553
1554
1555 /*
1556  * Find an association for a specific endpoint using the association id given
1557  * out in the COMM_UP notification
1558  */
1559 struct sctp_tcb *
1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1561 {
1562         /*
1563          * Use my the assoc_id to find a endpoint
1564          */
1565         struct sctpasochead *head;
1566         struct sctp_tcb *stcb;
1567         uint32_t id;
1568
1569         if (inp == NULL) {
1570                 SCTP_PRINTF("TSNH ep_associd\n");
1571                 return (NULL);
1572         }
1573         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1574                 SCTP_PRINTF("TSNH ep_associd0\n");
1575                 return (NULL);
1576         }
1577         id = (uint32_t) asoc_id;
1578         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1579         if (head == NULL) {
1580                 /* invalid id TSNH */
1581                 SCTP_PRINTF("TSNH ep_associd1\n");
1582                 return (NULL);
1583         }
1584         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1585                 if (stcb->asoc.assoc_id == id) {
1586                         if (inp != stcb->sctp_ep) {
1587                                 /*
1588                                  * some other guy has the same id active (id
1589                                  * collision ??).
1590                                  */
1591                                 SCTP_PRINTF("TSNH ep_associd2\n");
1592                                 continue;
1593                         }
1594                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1595                                 continue;
1596                         }
1597                         if (want_lock) {
1598                                 SCTP_TCB_LOCK(stcb);
1599                         }
1600                         return (stcb);
1601                 }
1602         }
1603         return (NULL);
1604 }
1605
1606
1607 struct sctp_tcb *
1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1609 {
1610         struct sctp_tcb *stcb;
1611
1612         SCTP_INP_RLOCK(inp);
1613         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1614         SCTP_INP_RUNLOCK(inp);
1615         return (stcb);
1616 }
1617
1618
1619 /*
1620  * Endpoint probe expects that the INP_INFO is locked.
1621  */
1622 static struct sctp_inpcb *
1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1624     uint16_t lport, uint32_t vrf_id)
1625 {
1626         struct sctp_inpcb *inp;
1627         struct sctp_laddr *laddr;
1628
1629 #ifdef INET
1630         struct sockaddr_in *sin;
1631
1632 #endif
1633 #ifdef INET6
1634         struct sockaddr_in6 *sin6;
1635         struct sockaddr_in6 *intf_addr6;
1636
1637 #endif
1638         int fnd;
1639
1640 #ifdef INET
1641         sin = NULL;
1642 #endif
1643 #ifdef INET6
1644         sin6 = NULL;
1645 #endif
1646         switch (nam->sa_family) {
1647 #ifdef INET
1648         case AF_INET:
1649                 sin = (struct sockaddr_in *)nam;
1650                 break;
1651 #endif
1652 #ifdef INET6
1653         case AF_INET6:
1654                 sin6 = (struct sockaddr_in6 *)nam;
1655                 break;
1656 #endif
1657         default:
1658                 /* unsupported family */
1659                 return (NULL);
1660         }
1661
1662         if (head == NULL)
1663                 return (NULL);
1664
1665         LIST_FOREACH(inp, head, sctp_hash) {
1666                 SCTP_INP_RLOCK(inp);
1667                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1668                         SCTP_INP_RUNLOCK(inp);
1669                         continue;
1670                 }
1671                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1672                     (inp->sctp_lport == lport)) {
1673                         /* got it */
1674                         switch (nam->sa_family) {
1675 #ifdef INET
1676                         case AF_INET:
1677                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1678                                     SCTP_IPV6_V6ONLY(inp)) {
1679                                         /*
1680                                          * IPv4 on a IPv6 socket with ONLY
1681                                          * IPv6 set
1682                                          */
1683                                         SCTP_INP_RUNLOCK(inp);
1684                                         continue;
1685                                 }
1686                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1687                                     &sin->sin_addr) != 0) {
1688                                         SCTP_INP_RUNLOCK(inp);
1689                                         continue;
1690                                 }
1691                                 break;
1692 #endif
1693 #ifdef INET6
1694                         case AF_INET6:
1695                                 /*
1696                                  * A V6 address and the endpoint is NOT
1697                                  * bound V6
1698                                  */
1699                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1700                                         SCTP_INP_RUNLOCK(inp);
1701                                         continue;
1702                                 }
1703                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1704                                     &sin6->sin6_addr) != 0) {
1705                                         SCTP_INP_RUNLOCK(inp);
1706                                         continue;
1707                                 }
1708                                 break;
1709 #endif
1710                         default:
1711                                 break;
1712                         }
1713                         /* does a VRF id match? */
1714                         fnd = 0;
1715                         if (inp->def_vrf_id == vrf_id)
1716                                 fnd = 1;
1717
1718                         SCTP_INP_RUNLOCK(inp);
1719                         if (!fnd)
1720                                 continue;
1721                         return (inp);
1722                 }
1723                 SCTP_INP_RUNLOCK(inp);
1724         }
1725         switch (nam->sa_family) {
1726 #ifdef INET
1727         case AF_INET:
1728                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1729                         /* Can't hunt for one that has no address specified */
1730                         return (NULL);
1731                 }
1732                 break;
1733 #endif
1734 #ifdef INET6
1735         case AF_INET6:
1736                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1737                         /* Can't hunt for one that has no address specified */
1738                         return (NULL);
1739                 }
1740                 break;
1741 #endif
1742         default:
1743                 break;
1744         }
1745         /*
1746          * ok, not bound to all so see if we can find a EP bound to this
1747          * address.
1748          */
1749         LIST_FOREACH(inp, head, sctp_hash) {
1750                 SCTP_INP_RLOCK(inp);
1751                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1752                         SCTP_INP_RUNLOCK(inp);
1753                         continue;
1754                 }
1755                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1756                         SCTP_INP_RUNLOCK(inp);
1757                         continue;
1758                 }
1759                 /*
1760                  * Ok this could be a likely candidate, look at all of its
1761                  * addresses
1762                  */
1763                 if (inp->sctp_lport != lport) {
1764                         SCTP_INP_RUNLOCK(inp);
1765                         continue;
1766                 }
1767                 /* does a VRF id match? */
1768                 fnd = 0;
1769                 if (inp->def_vrf_id == vrf_id)
1770                         fnd = 1;
1771
1772                 if (!fnd) {
1773                         SCTP_INP_RUNLOCK(inp);
1774                         continue;
1775                 }
1776                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1777                         if (laddr->ifa == NULL) {
1778                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1779                                     __FUNCTION__);
1780                                 continue;
1781                         }
1782                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1783                             (void *)laddr->ifa);
1784                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1785                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1786                                 continue;
1787                         }
1788                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1789                                 /* possible, see if it matches */
1790                                 switch (nam->sa_family) {
1791 #ifdef INET
1792                                 case AF_INET:
1793                                         if (sin->sin_addr.s_addr ==
1794                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800 #ifdef INET6
1801                                 case AF_INET6:
1802                                         intf_addr6 = &laddr->ifa->address.sin6;
1803                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1804                                             intf_addr6)) {
1805                                                 SCTP_INP_RUNLOCK(inp);
1806                                                 return (inp);
1807                                         }
1808                                         break;
1809 #endif
1810                                 }
1811                         }
1812                 }
1813                 SCTP_INP_RUNLOCK(inp);
1814         }
1815         return (NULL);
1816 }
1817
1818
1819 static struct sctp_inpcb *
1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1821 {
1822         struct sctppcbhead *head;
1823         struct sctp_inpcb *t_inp;
1824         int fnd;
1825
1826         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1827             SCTP_BASE_INFO(hashmark))];
1828         LIST_FOREACH(t_inp, head, sctp_hash) {
1829                 if (t_inp->sctp_lport != lport) {
1830                         continue;
1831                 }
1832                 /* is it in the VRF in question */
1833                 fnd = 0;
1834                 if (t_inp->def_vrf_id == vrf_id)
1835                         fnd = 1;
1836                 if (!fnd)
1837                         continue;
1838
1839                 /* This one is in use. */
1840                 /* check the v6/v4 binding issue */
1841                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1842                     SCTP_IPV6_V6ONLY(t_inp)) {
1843                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1844                                 /* collision in V6 space */
1845                                 return (t_inp);
1846                         } else {
1847                                 /* inp is BOUND_V4 no conflict */
1848                                 continue;
1849                         }
1850                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1851                         /* t_inp is bound v4 and v6, conflict always */
1852                         return (t_inp);
1853                 } else {
1854                         /* t_inp is bound only V4 */
1855                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1856                             SCTP_IPV6_V6ONLY(inp)) {
1857                                 /* no conflict */
1858                                 continue;
1859                         }
1860                         /* else fall through to conflict */
1861                 }
1862                 return (t_inp);
1863         }
1864         return (NULL);
1865 }
1866
1867
1868 int
1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1870 {
1871         /* For 1-2-1 with port reuse */
1872         struct sctppcbhead *head;
1873         struct sctp_inpcb *tinp;
1874
1875         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1876                 /* only works with port reuse on */
1877                 return (-1);
1878         }
1879         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1880                 return (0);
1881         }
1882         SCTP_INP_RUNLOCK(inp);
1883         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1884             SCTP_BASE_INFO(hashmark))];
1885         /* Kick out all non-listeners to the TCP hash */
1886         LIST_FOREACH(tinp, head, sctp_hash) {
1887                 if (tinp->sctp_lport != inp->sctp_lport) {
1888                         continue;
1889                 }
1890                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1891                         continue;
1892                 }
1893                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1894                         continue;
1895                 }
1896                 if (tinp->sctp_socket->so_qlimit) {
1897                         continue;
1898                 }
1899                 SCTP_INP_WLOCK(tinp);
1900                 LIST_REMOVE(tinp, sctp_hash);
1901                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1902                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1903                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1904                 SCTP_INP_WUNLOCK(tinp);
1905         }
1906         SCTP_INP_WLOCK(inp);
1907         /* Pull from where he was */
1908         LIST_REMOVE(inp, sctp_hash);
1909         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1910         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1911         LIST_INSERT_HEAD(head, inp, sctp_hash);
1912         SCTP_INP_WUNLOCK(inp);
1913         SCTP_INP_RLOCK(inp);
1914         return (0);
1915 }
1916
1917
1918 struct sctp_inpcb *
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1920     uint32_t vrf_id)
1921 {
1922         /*
1923          * First we check the hash table to see if someone has this port
1924          * bound with just the port.
1925          */
1926         struct sctp_inpcb *inp;
1927         struct sctppcbhead *head;
1928         int lport;
1929         unsigned int i;
1930
1931 #ifdef INET
1932         struct sockaddr_in *sin;
1933
1934 #endif
1935 #ifdef INET6
1936         struct sockaddr_in6 *sin6;
1937
1938 #endif
1939
1940         switch (nam->sa_family) {
1941 #ifdef INET
1942         case AF_INET:
1943                 sin = (struct sockaddr_in *)nam;
1944                 lport = sin->sin_port;
1945                 break;
1946 #endif
1947 #ifdef INET6
1948         case AF_INET6:
1949                 sin6 = (struct sockaddr_in6 *)nam;
1950                 lport = sin6->sin6_port;
1951                 break;
1952 #endif
1953         default:
1954                 return (NULL);
1955         }
1956         /*
1957          * I could cheat here and just cast to one of the types but we will
1958          * do it right. It also provides the check against an Unsupported
1959          * type too.
1960          */
1961         /* Find the head of the ALLADDR chain */
1962         if (have_lock == 0) {
1963                 SCTP_INP_INFO_RLOCK();
1964         }
1965         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1966             SCTP_BASE_INFO(hashmark))];
1967         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1968
1969         /*
1970          * If the TCP model exists it could be that the main listening
1971          * endpoint is gone but there still exists a connected socket for
1972          * this guy. If so we can return the first one that we find. This
1973          * may NOT be the correct one so the caller should be wary on the
1974          * returned INP. Currently the only caller that sets find_tcp_pool
1975          * is in bindx where we are verifying that a user CAN bind the
1976          * address. He either has bound it already, or someone else has, or
1977          * its open to bind, so this is good enough.
1978          */
1979         if (inp == NULL && find_tcp_pool) {
1980                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1981                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1982                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1983                         if (inp) {
1984                                 break;
1985                         }
1986                 }
1987         }
1988         if (inp) {
1989                 SCTP_INP_INCR_REF(inp);
1990         }
1991         if (have_lock == 0) {
1992                 SCTP_INP_INFO_RUNLOCK();
1993         }
1994         return (inp);
1995 }
1996
1997
1998 /*
1999  * Find an association for an endpoint with the pointer to whom you want to
2000  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2001  * need to change the *to to some other struct like a mbuf...
2002  */
2003 struct sctp_tcb *
2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2005     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2006     uint32_t vrf_id)
2007 {
2008         struct sctp_inpcb *inp = NULL;
2009         struct sctp_tcb *stcb;
2010
2011         SCTP_INP_INFO_RLOCK();
2012         if (find_tcp_pool) {
2013                 if (inp_p != NULL) {
2014                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2015                             vrf_id);
2016                 } else {
2017                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2018                             vrf_id);
2019                 }
2020                 if (stcb != NULL) {
2021                         SCTP_INP_INFO_RUNLOCK();
2022                         return (stcb);
2023                 }
2024         }
2025         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2026         if (inp_p != NULL) {
2027                 *inp_p = inp;
2028         }
2029         SCTP_INP_INFO_RUNLOCK();
2030         if (inp == NULL) {
2031                 return (NULL);
2032         }
2033         /*
2034          * ok, we have an endpoint, now lets find the assoc for it (if any)
2035          * we now place the source address or from in the to of the find
2036          * endpoint call. Since in reality this chain is used from the
2037          * inbound packet side.
2038          */
2039         if (inp_p != NULL) {
2040                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2041                     NULL);
2042         } else {
2043                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2044                     NULL);
2045         }
2046         return (stcb);
2047 }
2048
2049
2050 /*
2051  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2052  * find all addresses that the sender has specified in any address list. Each
2053  * address will be used to lookup the TCB and see if one exits.
2054  */
2055 static struct sctp_tcb *
2056 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2057     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2058     struct sockaddr *dst)
2059 {
2060         struct sctp_paramhdr *phdr, parm_buf;
2061
2062 #if defined(INET) || defined(INET6)
2063         struct sctp_tcb *stcb;
2064         uint16_t ptype;
2065
2066 #endif
2067         uint16_t plen;
2068
2069 #ifdef INET
2070         struct sockaddr_in sin4;
2071
2072 #endif
2073 #ifdef INET6
2074         struct sockaddr_in6 sin6;
2075
2076 #endif
2077
2078 #ifdef INET
2079         memset(&sin4, 0, sizeof(sin4));
2080         sin4.sin_len = sizeof(sin4);
2081         sin4.sin_family = AF_INET;
2082         sin4.sin_port = sh->src_port;
2083 #endif
2084 #ifdef INET6
2085         memset(&sin6, 0, sizeof(sin6));
2086         sin6.sin6_len = sizeof(sin6);
2087         sin6.sin6_family = AF_INET6;
2088         sin6.sin6_port = sh->src_port;
2089 #endif
2090
2091         offset += sizeof(struct sctp_init_chunk);
2092
2093         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2094         while (phdr != NULL) {
2095                 /* now we must see if we want the parameter */
2096 #if defined(INET) || defined(INET6)
2097                 ptype = ntohs(phdr->param_type);
2098 #endif
2099                 plen = ntohs(phdr->param_length);
2100                 if (plen == 0) {
2101                         break;
2102                 }
2103 #ifdef INET
2104                 if (ptype == SCTP_IPV4_ADDRESS &&
2105                     plen == sizeof(struct sctp_ipv4addr_param)) {
2106                         /* Get the rest of the address */
2107                         struct sctp_ipv4addr_param ip4_parm, *p4;
2108
2109                         phdr = sctp_get_next_param(m, offset,
2110                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2111                         if (phdr == NULL) {
2112                                 return (NULL);
2113                         }
2114                         p4 = (struct sctp_ipv4addr_param *)phdr;
2115                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2116                         /* look it up */
2117                         stcb = sctp_findassociation_ep_addr(inp_p,
2118                             (struct sockaddr *)&sin4, netp, dst, NULL);
2119                         if (stcb != NULL) {
2120                                 return (stcb);
2121                         }
2122                 }
2123 #endif
2124 #ifdef INET6
2125                 if (ptype == SCTP_IPV6_ADDRESS &&
2126                     plen == sizeof(struct sctp_ipv6addr_param)) {
2127                         /* Get the rest of the address */
2128                         struct sctp_ipv6addr_param ip6_parm, *p6;
2129
2130                         phdr = sctp_get_next_param(m, offset,
2131                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2132                         if (phdr == NULL) {
2133                                 return (NULL);
2134                         }
2135                         p6 = (struct sctp_ipv6addr_param *)phdr;
2136                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2137                         /* look it up */
2138                         stcb = sctp_findassociation_ep_addr(inp_p,
2139                             (struct sockaddr *)&sin6, netp, dst, NULL);
2140                         if (stcb != NULL) {
2141                                 return (stcb);
2142                         }
2143                 }
2144 #endif
2145                 offset += SCTP_SIZE32(plen);
2146                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2147                     sizeof(parm_buf));
2148         }
2149         return (NULL);
2150 }
2151
2152 static struct sctp_tcb *
2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2154     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2155     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2156 {
2157         /*
2158          * Use my vtag to hash. If we find it we then verify the source addr
2159          * is in the assoc. If all goes well we save a bit on rec of a
2160          * packet.
2161          */
2162         struct sctpasochead *head;
2163         struct sctp_nets *net;
2164         struct sctp_tcb *stcb;
2165
2166         SCTP_INP_INFO_RLOCK();
2167         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2168             SCTP_BASE_INFO(hashasocmark))];
2169         if (head == NULL) {
2170                 /* invalid vtag */
2171                 SCTP_INP_INFO_RUNLOCK();
2172                 return (NULL);
2173         }
2174         LIST_FOREACH(stcb, head, sctp_asocs) {
2175                 SCTP_INP_RLOCK(stcb->sctp_ep);
2176                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2177                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2178                         continue;
2179                 }
2180                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2181                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2182                         continue;
2183                 }
2184                 SCTP_TCB_LOCK(stcb);
2185                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2186                 if (stcb->asoc.my_vtag == vtag) {
2187                         /* candidate */
2188                         if (stcb->rport != rport) {
2189                                 SCTP_TCB_UNLOCK(stcb);
2190                                 continue;
2191                         }
2192                         if (stcb->sctp_ep->sctp_lport != lport) {
2193                                 SCTP_TCB_UNLOCK(stcb);
2194                                 continue;
2195                         }
2196                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         /* RRS:Need toaddr check here */
2201                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2202                                 /* Endpoint does not own this address */
2203                                 SCTP_TCB_UNLOCK(stcb);
2204                                 continue;
2205                         }
2206                         if (remote_tag) {
2207                                 /*
2208                                  * If we have both vtags that's all we match
2209                                  * on
2210                                  */
2211                                 if (stcb->asoc.peer_vtag == remote_tag) {
2212                                         /*
2213                                          * If both tags match we consider it
2214                                          * conclusive and check NO
2215                                          * source/destination addresses
2216                                          */
2217                                         goto conclusive;
2218                                 }
2219                         }
2220                         if (skip_src_check) {
2221                 conclusive:
2222                                 if (from) {
2223                                         *netp = sctp_findnet(stcb, from);
2224                                 } else {
2225                                         *netp = NULL;   /* unknown */
2226                                 }
2227                                 if (inp_p)
2228                                         *inp_p = stcb->sctp_ep;
2229                                 SCTP_INP_INFO_RUNLOCK();
2230                                 return (stcb);
2231                         }
2232                         net = sctp_findnet(stcb, from);
2233                         if (net) {
2234                                 /* yep its him. */
2235                                 *netp = net;
2236                                 SCTP_STAT_INCR(sctps_vtagexpress);
2237                                 *inp_p = stcb->sctp_ep;
2238                                 SCTP_INP_INFO_RUNLOCK();
2239                                 return (stcb);
2240                         } else {
2241                                 /*
2242                                  * not him, this should only happen in rare
2243                                  * cases so I peg it.
2244                                  */
2245                                 SCTP_STAT_INCR(sctps_vtagbogus);
2246                         }
2247                 }
2248                 SCTP_TCB_UNLOCK(stcb);
2249         }
2250         SCTP_INP_INFO_RUNLOCK();
2251         return (NULL);
2252 }
2253
2254
2255 /*
2256  * Find an association with the pointer to the inbound IP packet. This can be
2257  * a IPv4 or IPv6 packet.
2258  */
2259 struct sctp_tcb *
2260 sctp_findassociation_addr(struct mbuf *m, int offset,
2261     struct sockaddr *src, struct sockaddr *dst,
2262     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2263     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2264 {
2265         int find_tcp_pool;
2266         struct sctp_tcb *stcb;
2267         struct sctp_inpcb *inp;
2268
2269         if (sh->v_tag) {
2270                 /* we only go down this path if vtag is non-zero */
2271                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2272                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2273                 if (stcb) {
2274                         return (stcb);
2275                 }
2276         }
2277         find_tcp_pool = 0;
2278         if ((ch->chunk_type != SCTP_INITIATION) &&
2279             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2280             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2281             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2282                 /* Other chunk types go to the tcp pool. */
2283                 find_tcp_pool = 1;
2284         }
2285         if (inp_p) {
2286                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2287                     find_tcp_pool, vrf_id);
2288                 inp = *inp_p;
2289         } else {
2290                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2291                     find_tcp_pool, vrf_id);
2292         }
2293         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2294         if (stcb == NULL && inp) {
2295                 /* Found a EP but not this address */
2296                 if ((ch->chunk_type == SCTP_INITIATION) ||
2297                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2298                         /*-
2299                          * special hook, we do NOT return linp or an
2300                          * association that is linked to an existing
2301                          * association that is under the TCP pool (i.e. no
2302                          * listener exists). The endpoint finding routine
2303                          * will always find a listener before examining the
2304                          * TCP pool.
2305                          */
2306                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2307                                 if (inp_p) {
2308                                         *inp_p = NULL;
2309                                 }
2310                                 return (NULL);
2311                         }
2312                         stcb = sctp_findassociation_special_addr(m,
2313                             offset, sh, &inp, netp, dst);
2314                         if (inp_p != NULL) {
2315                                 *inp_p = inp;
2316                         }
2317                 }
2318         }
2319         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2320         return (stcb);
2321 }
2322
2323 /*
2324  * lookup an association by an ASCONF lookup address.
2325  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2326  */
2327 struct sctp_tcb *
2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2329     struct sockaddr *dst, struct sctphdr *sh,
2330     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2331 {
2332         struct sctp_tcb *stcb;
2333         struct sockaddr_storage remote_store;
2334         struct sctp_paramhdr parm_buf, *phdr;
2335         int ptype;
2336         int zero_address = 0;
2337
2338 #ifdef INET
2339         struct sockaddr_in *sin;
2340
2341 #endif
2342 #ifdef INET6
2343         struct sockaddr_in6 *sin6;
2344
2345 #endif
2346
2347         memset(&remote_store, 0, sizeof(remote_store));
2348         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2349             &parm_buf, sizeof(struct sctp_paramhdr));
2350         if (phdr == NULL) {
2351                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2352                     __FUNCTION__);
2353                 return NULL;
2354         }
2355         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2356         /* get the correlation address */
2357         switch (ptype) {
2358 #ifdef INET6
2359         case SCTP_IPV6_ADDRESS:
2360                 {
2361                         /* ipv6 address param */
2362                         struct sctp_ipv6addr_param *p6, p6_buf;
2363
2364                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2365                                 return NULL;
2366                         }
2367                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2368                             offset + sizeof(struct sctp_asconf_chunk),
2369                             &p6_buf.ph, sizeof(*p6));
2370                         if (p6 == NULL) {
2371                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2372                                     __FUNCTION__);
2373                                 return (NULL);
2374                         }
2375                         sin6 = (struct sockaddr_in6 *)&remote_store;
2376                         sin6->sin6_family = AF_INET6;
2377                         sin6->sin6_len = sizeof(*sin6);
2378                         sin6->sin6_port = sh->src_port;
2379                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2380                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2381                                 zero_address = 1;
2382                         break;
2383                 }
2384 #endif
2385 #ifdef INET
2386         case SCTP_IPV4_ADDRESS:
2387                 {
2388                         /* ipv4 address param */
2389                         struct sctp_ipv4addr_param *p4, p4_buf;
2390
2391                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2392                                 return NULL;
2393                         }
2394                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2395                             offset + sizeof(struct sctp_asconf_chunk),
2396                             &p4_buf.ph, sizeof(*p4));
2397                         if (p4 == NULL) {
2398                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2399                                     __FUNCTION__);
2400                                 return (NULL);
2401                         }
2402                         sin = (struct sockaddr_in *)&remote_store;
2403                         sin->sin_family = AF_INET;
2404                         sin->sin_len = sizeof(*sin);
2405                         sin->sin_port = sh->src_port;
2406                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2407                         if (sin->sin_addr.s_addr == INADDR_ANY)
2408                                 zero_address = 1;
2409                         break;
2410                 }
2411 #endif
2412         default:
2413                 /* invalid address param type */
2414                 return NULL;
2415         }
2416
2417         if (zero_address) {
2418                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2419                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2420                 if (stcb != NULL) {
2421                         SCTP_INP_DECR_REF(*inp_p);
2422                 }
2423         } else {
2424                 stcb = sctp_findassociation_ep_addr(inp_p,
2425                     (struct sockaddr *)&remote_store, netp,
2426                     dst, NULL);
2427         }
2428         return (stcb);
2429 }
2430
2431
2432 /*
2433  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2434  * addresses. This way if we don't get a bind we by default pick a ephemeral
2435  * port with all addresses bound.
2436  */
2437 int
2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2439 {
2440         /*
2441          * we get called when a new endpoint starts up. We need to allocate
2442          * the sctp_inpcb structure from the zone and init it. Mark it as
2443          * unbound and find a port that we can use as an ephemeral with
2444          * INADDR_ANY. If the user binds later no problem we can then add in
2445          * the specific addresses. And setup the default parameters for the
2446          * EP.
2447          */
2448         int i, error;
2449         struct sctp_inpcb *inp;
2450         struct sctp_pcb *m;
2451         struct timeval time;
2452         sctp_sharedkey_t *null_key;
2453
2454         error = 0;
2455
2456         SCTP_INP_INFO_WLOCK();
2457         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2458         if (inp == NULL) {
2459                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2460                 SCTP_INP_INFO_WUNLOCK();
2461                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2462                 return (ENOBUFS);
2463         }
2464         /* zap it */
2465         bzero(inp, sizeof(*inp));
2466
2467         /* bump generations */
2468         /* setup socket pointers */
2469         inp->sctp_socket = so;
2470         inp->ip_inp.inp.inp_socket = so;
2471         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2472 #ifdef INET6
2473         if (INP_SOCKAF(so) == AF_INET6) {
2474                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2475                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2476                 }
2477                 if (MODULE_GLOBAL(ip6_v6only)) {
2478                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2479                 }
2480         }
2481 #endif
2482         inp->sctp_associd_counter = 1;
2483         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2484         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2485         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2486         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2487         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2488         if (SCTP_BASE_SYSCTL(sctp_auth_disable)) {
2489                 inp->auth_supported = 0;
2490         } else {
2491                 inp->auth_supported = 1;
2492         }
2493         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2494         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2495         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2496         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2497         /* init the small hash table we use to track asocid <-> tcb */
2498         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2499         if (inp->sctp_asocidhash == NULL) {
2500                 crfree(inp->ip_inp.inp.inp_cred);
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 SCTP_INP_INFO_WUNLOCK();
2503                 return (ENOBUFS);
2504         }
2505 #ifdef IPSEC
2506         {
2507                 struct inpcbpolicy *pcb_sp = NULL;
2508
2509                 error = ipsec_init_policy(so, &pcb_sp);
2510                 /* Arrange to share the policy */
2511                 inp->ip_inp.inp.inp_sp = pcb_sp;
2512                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2513         }
2514         if (error != 0) {
2515                 crfree(inp->ip_inp.inp.inp_cred);
2516                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2517                 SCTP_INP_INFO_WUNLOCK();
2518                 return error;
2519         }
2520 #endif                          /* IPSEC */
2521         SCTP_INCR_EP_COUNT();
2522         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2523         SCTP_INP_INFO_WUNLOCK();
2524
2525         so->so_pcb = (caddr_t)inp;
2526
2527         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2528                 /* UDP style socket */
2529                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2530                     SCTP_PCB_FLAGS_UNBOUND);
2531                 /* Be sure it is NON-BLOCKING IO for UDP */
2532                 /* SCTP_SET_SO_NBIO(so); */
2533         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2534                 /* TCP style socket */
2535                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2536                     SCTP_PCB_FLAGS_UNBOUND);
2537                 /* Be sure we have blocking IO by default */
2538                 SCTP_CLEAR_SO_NBIO(so);
2539         } else {
2540                 /*
2541                  * unsupported socket type (RAW, etc)- in case we missed it
2542                  * in protosw
2543                  */
2544                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2545                 so->so_pcb = NULL;
2546                 crfree(inp->ip_inp.inp.inp_cred);
2547                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2548                 return (EOPNOTSUPP);
2549         }
2550         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2551                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2552                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2553         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2554                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2555                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2556         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2557                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2558                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2559         }
2560         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2561             &inp->sctp_hashmark);
2562         if (inp->sctp_tcbhash == NULL) {
2563                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2564                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2565                 so->so_pcb = NULL;
2566                 crfree(inp->ip_inp.inp.inp_cred);
2567                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2568                 return (ENOBUFS);
2569         }
2570         inp->def_vrf_id = vrf_id;
2571
2572         SCTP_INP_INFO_WLOCK();
2573         SCTP_INP_LOCK_INIT(inp);
2574         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2575         SCTP_INP_READ_INIT(inp);
2576         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2577         /* lock the new ep */
2578         SCTP_INP_WLOCK(inp);
2579
2580         /* add it to the info area */
2581         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2582         SCTP_INP_INFO_WUNLOCK();
2583
2584         TAILQ_INIT(&inp->read_queue);
2585         LIST_INIT(&inp->sctp_addr_list);
2586
2587         LIST_INIT(&inp->sctp_asoc_list);
2588
2589 #ifdef SCTP_TRACK_FREED_ASOCS
2590         /* TEMP CODE */
2591         LIST_INIT(&inp->sctp_asoc_free_list);
2592 #endif
2593         /* Init the timer structure for signature change */
2594         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2595         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2596
2597         /* now init the actual endpoint default data */
2598         m = &inp->sctp_ep;
2599
2600         /* setup the base timeout information */
2601         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2602         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2603         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2604         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2605         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2606         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2607         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2608         /* all max/min max are in ms */
2609         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2610         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2611         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2612         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2613         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2614         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2615         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2616         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2617         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2618         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2619         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2620         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2621         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2622
2623         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2624         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2625         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2626         /* number of streams to pre-open on a association */
2627         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2628
2629         /* Add adaptation cookie */
2630         m->adaptation_layer_indicator = 0;
2631         m->adaptation_layer_indicator_provided = 0;
2632
2633         /* seed random number generator */
2634         m->random_counter = 1;
2635         m->store_at = SCTP_SIGNATURE_SIZE;
2636         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2637         sctp_fill_random_store(m);
2638
2639         /* Minimum cookie size */
2640         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2641             sizeof(struct sctp_state_cookie);
2642         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2643
2644         /* Setup the initial secret */
2645         (void)SCTP_GETTIME_TIMEVAL(&time);
2646         m->time_of_secret_change = time.tv_sec;
2647
2648         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2649                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2650         }
2651         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2652
2653         /* How long is a cookie good for ? */
2654         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2655         /*
2656          * Initialize authentication parameters
2657          */
2658         m->local_hmacs = sctp_default_supported_hmaclist();
2659         m->local_auth_chunks = sctp_alloc_chunklist();
2660         if (inp->asconf_supported) {
2661                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2662                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2663         }
2664         m->default_dscp = 0;
2665 #ifdef INET6
2666         m->default_flowlabel = 0;
2667 #endif
2668         m->port = 0;            /* encapsulation disabled by default */
2669         LIST_INIT(&m->shared_keys);
2670         /* add default NULL key as key id 0 */
2671         null_key = sctp_alloc_sharedkey();
2672         sctp_insert_sharedkey(&m->shared_keys, null_key);
2673         SCTP_INP_WUNLOCK(inp);
2674 #ifdef SCTP_LOG_CLOSING
2675         sctp_log_closing(inp, NULL, 12);
2676 #endif
2677         return (error);
2678 }
2679
2680
2681 void
2682 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2683     struct sctp_tcb *stcb)
2684 {
2685         struct sctp_nets *net;
2686         uint16_t lport, rport;
2687         struct sctppcbhead *head;
2688         struct sctp_laddr *laddr, *oladdr;
2689
2690         atomic_add_int(&stcb->asoc.refcnt, 1);
2691         SCTP_TCB_UNLOCK(stcb);
2692         SCTP_INP_INFO_WLOCK();
2693         SCTP_INP_WLOCK(old_inp);
2694         SCTP_INP_WLOCK(new_inp);
2695         SCTP_TCB_LOCK(stcb);
2696         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2697
2698         new_inp->sctp_ep.time_of_secret_change =
2699             old_inp->sctp_ep.time_of_secret_change;
2700         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2701             sizeof(old_inp->sctp_ep.secret_key));
2702         new_inp->sctp_ep.current_secret_number =
2703             old_inp->sctp_ep.current_secret_number;
2704         new_inp->sctp_ep.last_secret_number =
2705             old_inp->sctp_ep.last_secret_number;
2706         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2707
2708         /* make it so new data pours into the new socket */
2709         stcb->sctp_socket = new_inp->sctp_socket;
2710         stcb->sctp_ep = new_inp;
2711
2712         /* Copy the port across */
2713         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2714         rport = stcb->rport;
2715         /* Pull the tcb from the old association */
2716         LIST_REMOVE(stcb, sctp_tcbhash);
2717         LIST_REMOVE(stcb, sctp_tcblist);
2718         if (stcb->asoc.in_asocid_hash) {
2719                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2720         }
2721         /* Now insert the new_inp into the TCP connected hash */
2722         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2723
2724         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2725         /* Its safe to access */
2726         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2727
2728         /* Now move the tcb into the endpoint list */
2729         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2730         /*
2731          * Question, do we even need to worry about the ep-hash since we
2732          * only have one connection? Probably not :> so lets get rid of it
2733          * and not suck up any kernel memory in that.
2734          */
2735         if (stcb->asoc.in_asocid_hash) {
2736                 struct sctpasochead *lhd;
2737
2738                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2739                     new_inp->hashasocidmark)];
2740                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2741         }
2742         /* Ok. Let's restart timer. */
2743         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2744                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2745                     stcb, net);
2746         }
2747
2748         SCTP_INP_INFO_WUNLOCK();
2749         if (new_inp->sctp_tcbhash != NULL) {
2750                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2751                 new_inp->sctp_tcbhash = NULL;
2752         }
2753         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2754                 /* Subset bound, so copy in the laddr list from the old_inp */
2755                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2756                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2757                         if (laddr == NULL) {
2758                                 /*
2759                                  * Gak, what can we do? This assoc is really
2760                                  * HOSED. We probably should send an abort
2761                                  * here.
2762                                  */
2763                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2764                                 continue;
2765                         }
2766                         SCTP_INCR_LADDR_COUNT();
2767                         bzero(laddr, sizeof(*laddr));
2768                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2769                         laddr->ifa = oladdr->ifa;
2770                         atomic_add_int(&laddr->ifa->refcount, 1);
2771                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2772                             sctp_nxt_addr);
2773                         new_inp->laddr_count++;
2774                         if (oladdr == stcb->asoc.last_used_address) {
2775                                 stcb->asoc.last_used_address = laddr;
2776                         }
2777                 }
2778         }
2779         /*
2780          * Now any running timers need to be adjusted since we really don't
2781          * care if they are running or not just blast in the new_inp into
2782          * all of them.
2783          */
2784
2785         stcb->asoc.dack_timer.ep = (void *)new_inp;
2786         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2787         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2788         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2789         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2790         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2791         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2792         /* now what about the nets? */
2793         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2794                 net->pmtu_timer.ep = (void *)new_inp;
2795                 net->hb_timer.ep = (void *)new_inp;
2796                 net->rxt_timer.ep = (void *)new_inp;
2797         }
2798         SCTP_INP_WUNLOCK(new_inp);
2799         SCTP_INP_WUNLOCK(old_inp);
2800 }
2801
2802
2803
2804
2805 /* sctp_ifap is used to bypass normal local address validation checks */
2806 int
2807 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2808     struct sctp_ifa *sctp_ifap, struct thread *p)
2809 {
2810         /* bind a ep to a socket address */
2811         struct sctppcbhead *head;
2812         struct sctp_inpcb *inp, *inp_tmp;
2813         struct inpcb *ip_inp;
2814         int port_reuse_active = 0;
2815         int bindall;
2816         uint16_t lport;
2817         int error;
2818         uint32_t vrf_id;
2819
2820         lport = 0;
2821         bindall = 1;
2822         inp = (struct sctp_inpcb *)so->so_pcb;
2823         ip_inp = (struct inpcb *)so->so_pcb;
2824 #ifdef SCTP_DEBUG
2825         if (addr) {
2826                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2827                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2828                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2829                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2830         }
2831 #endif
2832         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2833                 /* already did a bind, subsequent binds NOT allowed ! */
2834                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2835                 return (EINVAL);
2836         }
2837 #ifdef INVARIANTS
2838         if (p == NULL)
2839                 panic("null proc/thread");
2840 #endif
2841         if (addr != NULL) {
2842                 switch (addr->sa_family) {
2843 #ifdef INET
2844                 case AF_INET:
2845                         {
2846                                 struct sockaddr_in *sin;
2847
2848                                 /* IPV6_V6ONLY socket? */
2849                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2850                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2851                                         return (EINVAL);
2852                                 }
2853                                 if (addr->sa_len != sizeof(*sin)) {
2854                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2855                                         return (EINVAL);
2856                                 }
2857                                 sin = (struct sockaddr_in *)addr;
2858                                 lport = sin->sin_port;
2859                                 /*
2860                                  * For LOOPBACK the prison_local_ip4() call
2861                                  * will transmute the ip address to the
2862                                  * proper value.
2863                                  */
2864                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2865                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2866                                         return (error);
2867                                 }
2868                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2869                                         bindall = 0;
2870                                 }
2871                                 break;
2872                         }
2873 #endif
2874 #ifdef INET6
2875                 case AF_INET6:
2876                         {
2877                                 /*
2878                                  * Only for pure IPv6 Address. (No IPv4
2879                                  * Mapped!)
2880                                  */
2881                                 struct sockaddr_in6 *sin6;
2882
2883                                 sin6 = (struct sockaddr_in6 *)addr;
2884
2885                                 if (addr->sa_len != sizeof(*sin6)) {
2886                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887                                         return (EINVAL);
2888                                 }
2889                                 lport = sin6->sin6_port;
2890                                 /*
2891                                  * For LOOPBACK the prison_local_ip6() call
2892                                  * will transmute the ipv6 address to the
2893                                  * proper value.
2894                                  */
2895                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2896                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2897                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2898                                         return (error);
2899                                 }
2900                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2901                                         bindall = 0;
2902                                         /* KAME hack: embed scopeid */
2903                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2904                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2905                                                 return (EINVAL);
2906                                         }
2907                                 }
2908                                 /* this must be cleared for ifa_ifwithaddr() */
2909                                 sin6->sin6_scope_id = 0;
2910                                 break;
2911                         }
2912 #endif
2913                 default:
2914                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2915                         return (EAFNOSUPPORT);
2916                 }
2917         }
2918         SCTP_INP_INFO_WLOCK();
2919         SCTP_INP_WLOCK(inp);
2920         /* Setup a vrf_id to be the default for the non-bind-all case. */
2921         vrf_id = inp->def_vrf_id;
2922
2923         /* increase our count due to the unlock we do */
2924         SCTP_INP_INCR_REF(inp);
2925         if (lport) {
2926                 /*
2927                  * Did the caller specify a port? if so we must see if an ep
2928                  * already has this one bound.
2929                  */
2930                 /* got to be root to get at low ports */
2931                 if (ntohs(lport) < IPPORT_RESERVED) {
2932                         if (p && (error =
2933                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2934                             )) {
2935                                 SCTP_INP_DECR_REF(inp);
2936                                 SCTP_INP_WUNLOCK(inp);
2937                                 SCTP_INP_INFO_WUNLOCK();
2938                                 return (error);
2939                         }
2940                 }
2941                 SCTP_INP_WUNLOCK(inp);
2942                 if (bindall) {
2943                         vrf_id = inp->def_vrf_id;
2944                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2945                         if (inp_tmp != NULL) {
2946                                 /*
2947                                  * lock guy returned and lower count note
2948                                  * that we are not bound so inp_tmp should
2949                                  * NEVER be inp. And it is this inp
2950                                  * (inp_tmp) that gets the reference bump,
2951                                  * so we must lower it.
2952                                  */
2953                                 SCTP_INP_DECR_REF(inp_tmp);
2954                                 /* unlock info */
2955                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2956                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2957                                         /*
2958                                          * Ok, must be one-2-one and
2959                                          * allowing port re-use
2960                                          */
2961                                         port_reuse_active = 1;
2962                                         goto continue_anyway;
2963                                 }
2964                                 SCTP_INP_DECR_REF(inp);
2965                                 SCTP_INP_INFO_WUNLOCK();
2966                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2967                                 return (EADDRINUSE);
2968                         }
2969                 } else {
2970                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2971                         if (inp_tmp != NULL) {
2972                                 /*
2973                                  * lock guy returned and lower count note
2974                                  * that we are not bound so inp_tmp should
2975                                  * NEVER be inp. And it is this inp
2976                                  * (inp_tmp) that gets the reference bump,
2977                                  * so we must lower it.
2978                                  */
2979                                 SCTP_INP_DECR_REF(inp_tmp);
2980                                 /* unlock info */
2981                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2982                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2983                                         /*
2984                                          * Ok, must be one-2-one and
2985                                          * allowing port re-use
2986                                          */
2987                                         port_reuse_active = 1;
2988                                         goto continue_anyway;
2989                                 }
2990                                 SCTP_INP_DECR_REF(inp);
2991                                 SCTP_INP_INFO_WUNLOCK();
2992                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993                                 return (EADDRINUSE);
2994                         }
2995                 }
2996 continue_anyway:
2997                 SCTP_INP_WLOCK(inp);
2998                 if (bindall) {
2999                         /* verify that no lport is not used by a singleton */
3000                         if ((port_reuse_active == 0) &&
3001                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3002                                 /* Sorry someone already has this one bound */
3003                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3004                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3005                                         port_reuse_active = 1;
3006                                 } else {
3007                                         SCTP_INP_DECR_REF(inp);
3008                                         SCTP_INP_WUNLOCK(inp);
3009                                         SCTP_INP_INFO_WUNLOCK();
3010                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3011                                         return (EADDRINUSE);
3012                                 }
3013                         }
3014                 }
3015         } else {
3016                 uint16_t first, last, candidate;
3017                 uint16_t count;
3018                 int done;
3019
3020                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3021                         first = MODULE_GLOBAL(ipport_hifirstauto);
3022                         last = MODULE_GLOBAL(ipport_hilastauto);
3023                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3024                         if (p && (error =
3025                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3026                             )) {
3027                                 SCTP_INP_DECR_REF(inp);
3028                                 SCTP_INP_WUNLOCK(inp);
3029                                 SCTP_INP_INFO_WUNLOCK();
3030                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3031                                 return (error);
3032                         }
3033                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3034                         last = MODULE_GLOBAL(ipport_lowlastauto);
3035                 } else {
3036                         first = MODULE_GLOBAL(ipport_firstauto);
3037                         last = MODULE_GLOBAL(ipport_lastauto);
3038                 }
3039                 if (first > last) {
3040                         uint16_t temp;
3041
3042                         temp = first;
3043                         first = last;
3044                         last = temp;
3045                 }
3046                 count = last - first + 1;       /* number of candidates */
3047                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3048
3049                 done = 0;
3050                 while (!done) {
3051                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3052                                 done = 1;
3053                         }
3054                         if (!done) {
3055                                 if (--count == 0) {
3056                                         SCTP_INP_DECR_REF(inp);
3057                                         SCTP_INP_WUNLOCK(inp);
3058                                         SCTP_INP_INFO_WUNLOCK();
3059                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3060                                         return (EADDRINUSE);
3061                                 }
3062                                 if (candidate == last)
3063                                         candidate = first;
3064                                 else
3065                                         candidate = candidate + 1;
3066                         }
3067                 }
3068                 lport = htons(candidate);
3069         }
3070         SCTP_INP_DECR_REF(inp);
3071         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3072             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3073                 /*
3074                  * this really should not happen. The guy did a non-blocking
3075                  * bind and then did a close at the same time.
3076                  */
3077                 SCTP_INP_WUNLOCK(inp);
3078                 SCTP_INP_INFO_WUNLOCK();
3079                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3080                 return (EINVAL);
3081         }
3082         /* ok we look clear to give out this port, so lets setup the binding */
3083         if (bindall) {
3084                 /* binding to all addresses, so just set in the proper flags */
3085                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3086                 /* set the automatic addr changes from kernel flag */
3087                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3088                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090                 } else {
3091                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093                 }
3094                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3095                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 } else {
3097                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098                 }
3099                 /*
3100                  * set the automatic mobility_base from kernel flag (by
3101                  * micchie)
3102                  */
3103                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 } else {
3107                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109                 }
3110                 /*
3111                  * set the automatic mobility_fasthandoff from kernel flag
3112                  * (by micchie)
3113                  */
3114                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3115                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3116                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117                 } else {
3118                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3119                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120                 }
3121         } else {
3122                 /*
3123                  * bind specific, make sure flags is off and add a new
3124                  * address structure to the sctp_addr_list inside the ep
3125                  * structure.
3126                  *
3127                  * We will need to allocate one and insert it at the head. The
3128                  * socketopt call can just insert new addresses in there as
3129                  * well. It will also have to do the embed scope kame hack
3130                  * too (before adding).
3131                  */
3132                 struct sctp_ifa *ifa;
3133                 struct sockaddr_storage store_sa;
3134
3135                 memset(&store_sa, 0, sizeof(store_sa));
3136                 switch (addr->sa_family) {
3137 #ifdef INET
3138                 case AF_INET:
3139                         {
3140                                 struct sockaddr_in *sin;
3141
3142                                 sin = (struct sockaddr_in *)&store_sa;
3143                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3144                                 sin->sin_port = 0;
3145                                 break;
3146                         }
3147 #endif
3148 #ifdef INET6
3149                 case AF_INET6:
3150                         {
3151                                 struct sockaddr_in6 *sin6;
3152
3153                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3154                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3155                                 sin6->sin6_port = 0;
3156                                 break;
3157                         }
3158 #endif
3159                 default:
3160                         break;
3161                 }
3162                 /*
3163                  * first find the interface with the bound address need to
3164                  * zero out the port to find the address! yuck! can't do
3165                  * this earlier since need port for sctp_pcb_findep()
3166                  */
3167                 if (sctp_ifap != NULL) {
3168                         ifa = sctp_ifap;
3169                 } else {
3170                         /*
3171                          * Note for BSD we hit here always other O/S's will
3172                          * pass things in via the sctp_ifap argument
3173                          * (Panda).
3174                          */
3175                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3176                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3177                 }
3178                 if (ifa == NULL) {
3179                         /* Can't find an interface with that address */
3180                         SCTP_INP_WUNLOCK(inp);
3181                         SCTP_INP_INFO_WUNLOCK();
3182                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3183                         return (EADDRNOTAVAIL);
3184                 }
3185 #ifdef INET6
3186                 if (addr->sa_family == AF_INET6) {
3187                         /* GAK, more FIXME IFA lock? */
3188                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3189                                 /* Can't bind a non-existent addr. */
3190                                 SCTP_INP_WUNLOCK(inp);
3191                                 SCTP_INP_INFO_WUNLOCK();
3192                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3193                                 return (EINVAL);
3194                         }
3195                 }
3196 #endif
3197                 /* we're not bound all */
3198                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3199                 /* allow bindx() to send ASCONF's for binding changes */
3200                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3201                 /* clear automatic addr changes from kernel flag */
3202                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3203
3204                 /* add this address to the endpoint list */
3205                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3206                 if (error != 0) {
3207                         SCTP_INP_WUNLOCK(inp);
3208                         SCTP_INP_INFO_WUNLOCK();
3209                         return (error);
3210                 }
3211                 inp->laddr_count++;
3212         }
3213         /* find the bucket */
3214         if (port_reuse_active) {
3215                 /* Put it into tcp 1-2-1 hash */
3216                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3217                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3218         } else {
3219                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3220         }
3221         /* put it in the bucket */
3222         LIST_INSERT_HEAD(head, inp, sctp_hash);
3223         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3224             (void *)head, ntohs(lport), port_reuse_active);
3225         /* set in the port */
3226         inp->sctp_lport = lport;
3227
3228         /* turn off just the unbound flag */
3229         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3230         SCTP_INP_WUNLOCK(inp);
3231         SCTP_INP_INFO_WUNLOCK();
3232         return (0);
3233 }
3234
3235
3236 static void
3237 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3238 {
3239         struct sctp_iterator *it, *nit;
3240
3241         /*
3242          * We enter with the only the ITERATOR_LOCK in place and a write
3243          * lock on the inp_info stuff.
3244          */
3245         it = sctp_it_ctl.cur_it;
3246         if (it && (it->vn != curvnet)) {
3247                 /* Its not looking at our VNET */
3248                 return;
3249         }
3250         if (it && (it->inp == inp)) {
3251                 /*
3252                  * This is tricky and we hold the iterator lock, but when it
3253                  * returns and gets the lock (when we release it) the
3254                  * iterator will try to operate on inp. We need to stop that
3255                  * from happening. But of course the iterator has a
3256                  * reference on the stcb and inp. We can mark it and it will
3257                  * stop.
3258                  *
3259                  * If its a single iterator situation, we set the end iterator
3260                  * flag. Otherwise we set the iterator to go to the next
3261                  * inp.
3262                  *
3263                  */
3264                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3265                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3266                 } else {
3267                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3268                 }
3269         }
3270         /*
3271          * Now go through and remove any single reference to our inp that
3272          * may be still pending on the list
3273          */
3274         SCTP_IPI_ITERATOR_WQ_LOCK();
3275         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3276                 if (it->vn != curvnet) {
3277                         continue;
3278                 }
3279                 if (it->inp == inp) {
3280                         /* This one points to me is it inp specific? */
3281                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3282                                 /* Remove and free this one */
3283                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3284                                     it, sctp_nxt_itr);
3285                                 if (it->function_atend != NULL) {
3286                                         (*it->function_atend) (it->pointer, it->val);
3287                                 }
3288                                 SCTP_FREE(it, SCTP_M_ITER);
3289                         } else {
3290                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3291                                 if (it->inp) {
3292                                         SCTP_INP_INCR_REF(it->inp);
3293                                 }
3294                         }
3295                         /*
3296                          * When its put in the refcnt is incremented so decr
3297                          * it
3298                          */
3299                         SCTP_INP_DECR_REF(inp);
3300                 }
3301         }
3302         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3303 }
3304
3305 /* release sctp_inpcb unbind the port */
3306 void
3307 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3308 {
3309         /*
3310          * Here we free a endpoint. We must find it (if it is in the Hash
3311          * table) and remove it from there. Then we must also find it in the
3312          * overall list and remove it from there. After all removals are
3313          * complete then any timer has to be stopped. Then start the actual
3314          * freeing. a) Any local lists. b) Any associations. c) The hash of
3315          * all associations. d) finally the ep itself.
3316          */
3317         struct sctp_tcb *asoc, *nasoc;
3318         struct sctp_laddr *laddr, *nladdr;
3319         struct inpcb *ip_pcb;
3320         struct socket *so;
3321         int being_refed = 0;
3322         struct sctp_queued_to_read *sq, *nsq;
3323         int cnt;
3324         sctp_sharedkey_t *shared_key, *nshared_key;
3325
3326
3327 #ifdef SCTP_LOG_CLOSING
3328         sctp_log_closing(inp, NULL, 0);
3329 #endif
3330         SCTP_ITERATOR_LOCK();
3331         /* mark any iterators on the list or being processed */
3332         sctp_iterator_inp_being_freed(inp);
3333         SCTP_ITERATOR_UNLOCK();
3334         so = inp->sctp_socket;
3335         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3336                 /* been here before.. eeks.. get out of here */
3337                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3338 #ifdef SCTP_LOG_CLOSING
3339                 sctp_log_closing(inp, NULL, 1);
3340 #endif
3341                 return;
3342         }
3343         SCTP_ASOC_CREATE_LOCK(inp);
3344         SCTP_INP_INFO_WLOCK();
3345
3346         SCTP_INP_WLOCK(inp);
3347         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3348                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3349                 /* socket is gone, so no more wakeups allowed */
3350                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3351                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3352                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3353
3354         }
3355         /* First time through we have the socket lock, after that no more. */
3356         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3357             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3358
3359         if (inp->control) {
3360                 sctp_m_freem(inp->control);
3361                 inp->control = NULL;
3362         }
3363         if (inp->pkt) {
3364                 sctp_m_freem(inp->pkt);
3365                 inp->pkt = NULL;
3366         }
3367         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3368                                          * here but I will be nice :> (i.e.
3369                                          * ip_pcb = ep;) */
3370         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3371                 int cnt_in_sd;
3372
3373                 cnt_in_sd = 0;
3374                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3375                         SCTP_TCB_LOCK(asoc);
3376                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3377                                 /* Skip guys being freed */
3378                                 cnt_in_sd++;
3379                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3380                                         /*
3381                                          * Special case - we did not start a
3382                                          * kill timer on the asoc due to it
3383                                          * was not closed. So go ahead and
3384                                          * start it now.
3385                                          */
3386                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3387                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3388                                 }
3389                                 SCTP_TCB_UNLOCK(asoc);
3390                                 continue;
3391                         }
3392                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3393                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3394                             (asoc->asoc.total_output_queue_size == 0)) {
3395                                 /*
3396                                  * If we have data in queue, we don't want
3397                                  * to just free since the app may have done,
3398                                  * send()/close or connect/send/close. And
3399                                  * it wants the data to get across first.
3400                                  */
3401                                 /* Just abandon things in the front states */
3402                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3403                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3404                                         cnt_in_sd++;
3405                                 }
3406                                 continue;
3407                         }
3408                         /* Disconnect the socket please */
3409                         asoc->sctp_socket = NULL;
3410                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3411                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3412                             (asoc->asoc.control_pdapi) ||
3413                             (asoc->asoc.size_on_all_streams > 0) ||
3414                             (so && (so->so_rcv.sb_cc > 0))) {
3415                                 /* Left with Data unread */
3416                                 struct mbuf *op_err;
3417
3418                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3419                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3420                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3421                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3422                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3423                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3424                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3425                                 }
3426                                 if (sctp_free_assoc(inp, asoc,
3427                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3428                                         cnt_in_sd++;
3429                                 }
3430                                 continue;
3431                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3432                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3433                             (asoc->asoc.stream_queue_cnt == 0)) {
3434                                 if (asoc->asoc.locked_on_sending) {
3435                                         goto abort_anyway;
3436                                 }
3437                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3438                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3439                                         struct sctp_nets *netp;
3440
3441                                         /*
3442                                          * there is nothing queued to send,
3443                                          * so I send shutdown
3444                                          */
3445                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3446                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3447                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3448                                         }
3449                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3450                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3451                                         sctp_stop_timers_for_shutdown(asoc);
3452                                         if (asoc->asoc.alternate) {
3453                                                 netp = asoc->asoc.alternate;
3454                                         } else {
3455                                                 netp = asoc->asoc.primary_destination;
3456                                         }
3457                                         sctp_send_shutdown(asoc, netp);
3458                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3459                                             netp);
3460                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3461                                             asoc->asoc.primary_destination);
3462                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3463                                 }
3464                         } else {
3465                                 /* mark into shutdown pending */
3466                                 struct sctp_stream_queue_pending *sp;
3467
3468                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3469                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3470                                     asoc->asoc.primary_destination);
3471                                 if (asoc->asoc.locked_on_sending) {
3472                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3473                                             sctp_streamhead);
3474                                         if (sp == NULL) {
3475                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3476                                                     (void *)asoc->asoc.locked_on_sending,
3477                                                     asoc->asoc.locked_on_sending->stream_no);
3478                                         } else {
3479                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3480                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3481                                         }
3482                                 }
3483                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3484                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3485                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3486                                         struct mbuf *op_err;
3487
3488                         abort_anyway:
3489                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3490                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3491                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3492                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3493                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3494                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3495                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3496                                         }
3497                                         if (sctp_free_assoc(inp, asoc,
3498                                             SCTP_PCBFREE_NOFORCE,
3499                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3500                                                 cnt_in_sd++;
3501                                         }
3502                                         continue;
3503                                 } else {
3504                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3505                                 }
3506                         }
3507                         cnt_in_sd++;
3508                         SCTP_TCB_UNLOCK(asoc);
3509                 }
3510                 /* now is there some left in our SHUTDOWN state? */
3511                 if (cnt_in_sd) {
3512 #ifdef SCTP_LOG_CLOSING
3513                         sctp_log_closing(inp, NULL, 2);
3514 #endif
3515                         inp->sctp_socket = NULL;
3516                         SCTP_INP_WUNLOCK(inp);
3517                         SCTP_ASOC_CREATE_UNLOCK(inp);
3518                         SCTP_INP_INFO_WUNLOCK();
3519                         return;
3520                 }
3521         }
3522         inp->sctp_socket = NULL;
3523         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3524             SCTP_PCB_FLAGS_UNBOUND) {
3525                 /*
3526                  * ok, this guy has been bound. It's port is somewhere in
3527                  * the SCTP_BASE_INFO(hash table). Remove it!
3528                  */
3529                 LIST_REMOVE(inp, sctp_hash);
3530                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3531         }
3532         /*
3533          * If there is a timer running to kill us, forget it, since it may
3534          * have a contest on the INP lock.. which would cause us to die ...
3535          */
3536         cnt = 0;
3537         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3538                 SCTP_TCB_LOCK(asoc);
3539                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3540                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3541                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3542                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3543                         }
3544                         cnt++;
3545                         SCTP_TCB_UNLOCK(asoc);
3546                         continue;
3547                 }
3548                 /* Free associations that are NOT killing us */
3549                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3550                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3551                         struct mbuf *op_err;
3552
3553                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3554                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3555                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3556                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3557                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3558                         cnt++;
3559                         SCTP_TCB_UNLOCK(asoc);
3560                         continue;
3561                 }
3562                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3563                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3564                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3565                 }
3566                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3567                         cnt++;
3568                 }
3569         }
3570         if (cnt) {
3571                 /* Ok we have someone out there that will kill us */
3572                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3573 #ifdef SCTP_LOG_CLOSING
3574                 sctp_log_closing(inp, NULL, 3);
3575 #endif
3576                 SCTP_INP_WUNLOCK(inp);
3577                 SCTP_ASOC_CREATE_UNLOCK(inp);
3578                 SCTP_INP_INFO_WUNLOCK();
3579                 return;
3580         }
3581         if (SCTP_INP_LOCK_CONTENDED(inp))
3582                 being_refed++;
3583         if (SCTP_INP_READ_CONTENDED(inp))
3584                 being_refed++;
3585         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3586                 being_refed++;
3587
3588         if ((inp->refcount) ||
3589             (being_refed) ||
3590             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3591                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3592 #ifdef SCTP_LOG_CLOSING
3593                 sctp_log_closing(inp, NULL, 4);
3594 #endif
3595                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3596                 SCTP_INP_WUNLOCK(inp);
3597                 SCTP_ASOC_CREATE_UNLOCK(inp);
3598                 SCTP_INP_INFO_WUNLOCK();
3599                 return;
3600         }
3601         inp->sctp_ep.signature_change.type = 0;
3602         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3603         /*
3604          * Remove it from the list .. last thing we need a lock for.
3605          */
3606         LIST_REMOVE(inp, sctp_list);
3607         SCTP_INP_WUNLOCK(inp);
3608         SCTP_ASOC_CREATE_UNLOCK(inp);
3609         SCTP_INP_INFO_WUNLOCK();
3610         /*
3611          * Now we release all locks. Since this INP cannot be found anymore
3612          * except possibly by the kill timer that might be running. We call
3613          * the drain function here. It should hit the case were it sees the
3614          * ACTIVE flag cleared and exit out freeing us to proceed and
3615          * destroy everything.
3616          */
3617         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3618                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3619         } else {
3620                 /* Probably un-needed */
3621                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3622         }
3623
3624 #ifdef SCTP_LOG_CLOSING
3625         sctp_log_closing(inp, NULL, 5);
3626 #endif
3627
3628
3629         if ((inp->sctp_asocidhash) != NULL) {
3630                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3631                 inp->sctp_asocidhash = NULL;
3632         }
3633         /* sa_ignore FREED_MEMORY */
3634         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3635                 /* Its only abandoned if it had data left */
3636                 if (sq->length)
3637                         SCTP_STAT_INCR(sctps_left_abandon);
3638
3639                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3640                 sctp_free_remote_addr(sq->whoFrom);
3641                 if (so)
3642                         so->so_rcv.sb_cc -= sq->length;
3643                 if (sq->data) {
3644                         sctp_m_freem(sq->data);
3645                         sq->data = NULL;
3646                 }
3647                 /*
3648                  * no need to free the net count, since at this point all
3649                  * assoc's are gone.
3650                  */
3651                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3652                 SCTP_DECR_READQ_COUNT();
3653         }
3654         /* Now the sctp_pcb things */
3655         /*
3656          * free each asoc if it is not already closed/free. we can't use the
3657          * macro here since le_next will get freed as part of the
3658          * sctp_free_assoc() call.
3659          */
3660         if (so) {
3661 #ifdef IPSEC
3662                 ipsec_delete_pcbpolicy(ip_pcb);
3663 #endif                          /* IPSEC */
3664
3665                 /* Unlocks not needed since the socket is gone now */
3666         }
3667         if (ip_pcb->inp_options) {
3668                 (void)sctp_m_free(ip_pcb->inp_options);
3669                 ip_pcb->inp_options = 0;
3670         }
3671 #ifdef INET6
3672         if (ip_pcb->inp_vflag & INP_IPV6) {
3673                 struct in6pcb *in6p;
3674
3675                 in6p = (struct in6pcb *)inp;
3676                 ip6_freepcbopts(in6p->in6p_outputopts);
3677         }
3678 #endif                          /* INET6 */
3679         ip_pcb->inp_vflag = 0;
3680         /* free up authentication fields */
3681         if (inp->sctp_ep.local_auth_chunks != NULL)
3682                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3683         if (inp->sctp_ep.local_hmacs != NULL)
3684                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3685
3686         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3687                 LIST_REMOVE(shared_key, next);
3688                 sctp_free_sharedkey(shared_key);
3689                 /* sa_ignore FREED_MEMORY */
3690         }
3691
3692         /*
3693          * if we have an address list the following will free the list of
3694          * ifaddr's that are set into this ep. Again macro limitations here,
3695          * since the LIST_FOREACH could be a bad idea.
3696          */
3697         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3698                 sctp_remove_laddr(laddr);
3699         }
3700
3701 #ifdef SCTP_TRACK_FREED_ASOCS
3702         /* TEMP CODE */
3703         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3704                 LIST_REMOVE(asoc, sctp_tcblist);
3705                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3706                 SCTP_DECR_ASOC_COUNT();
3707         }
3708         /* *** END TEMP CODE *** */
3709 #endif
3710         /* Now lets see about freeing the EP hash table. */
3711         if (inp->sctp_tcbhash != NULL) {
3712                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3713                 inp->sctp_tcbhash = NULL;
3714         }
3715         /* Now we must put the ep memory back into the zone pool */
3716         crfree(inp->ip_inp.inp.inp_cred);
3717         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3718         SCTP_INP_LOCK_DESTROY(inp);
3719         SCTP_INP_READ_DESTROY(inp);
3720         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3721         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3722         SCTP_DECR_EP_COUNT();
3723 }
3724
3725
3726 struct sctp_nets *
3727 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3728 {
3729         struct sctp_nets *net;
3730
3731         /* locate the address */
3732         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3733                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3734                         return (net);
3735         }
3736         return (NULL);
3737 }
3738
3739
3740 int
3741 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3742 {
3743         struct sctp_ifa *sctp_ifa;
3744
3745         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3746         if (sctp_ifa) {
3747                 return (1);
3748         } else {
3749                 return (0);
3750         }
3751 }
3752
3753 /*
3754  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3755  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3756  * stats of stuff.
3757  */
3758 int
3759 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3760     struct sctp_nets **netp, int set_scope, int from)
3761 {
3762         /*
3763          * The following is redundant to the same lines in the
3764          * sctp_aloc_assoc() but is needed since others call the add address
3765          * function
3766          */
3767         struct sctp_nets *net, *netfirst;
3768         int addr_inscope;
3769
3770         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3771             from);
3772         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3773
3774         netfirst = sctp_findnet(stcb, newaddr);
3775         if (netfirst) {
3776                 /*
3777                  * Lie and return ok, we don't want to make the association
3778                  * go away for this behavior. It will happen in the TCP
3779                  * model in a connected socket. It does not reach the hash
3780                  * table until after the association is built so it can't be
3781                  * found. Mark as reachable, since the initial creation will
3782                  * have been cleared and the NOT_IN_ASSOC flag will have
3783                  * been added... and we don't want to end up removing it
3784                  * back out.
3785                  */
3786                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3787                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3788                             SCTP_ADDR_UNCONFIRMED);
3789                 } else {
3790                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3791                 }
3792
3793                 return (0);
3794         }
3795         addr_inscope = 1;
3796         switch (newaddr->sa_family) {
3797 #ifdef INET
3798         case AF_INET:
3799                 {
3800                         struct sockaddr_in *sin;
3801
3802                         sin = (struct sockaddr_in *)newaddr;
3803                         if (sin->sin_addr.s_addr == 0) {
3804                                 /* Invalid address */
3805                                 return (-1);
3806                         }
3807                         /* zero out the bzero area */
3808                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3809
3810                         /* assure len is set */
3811                         sin->sin_len = sizeof(struct sockaddr_in);
3812                         if (set_scope) {
3813 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3814                                 stcb->asoc.scope.ipv4_local_scope = 1;
3815 #else
3816                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3817                                         stcb->asoc.scope.ipv4_local_scope = 1;
3818                                 }
3819 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3820                         } else {
3821                                 /* Validate the address is in scope */
3822                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3823                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3824                                         addr_inscope = 0;
3825                                 }
3826                         }
3827                         break;
3828                 }
3829 #endif
3830 #ifdef INET6
3831         case AF_INET6:
3832                 {
3833                         struct sockaddr_in6 *sin6;
3834
3835                         sin6 = (struct sockaddr_in6 *)newaddr;
3836                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3837                                 /* Invalid address */
3838                                 return (-1);
3839                         }
3840                         /* assure len is set */
3841                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3842                         if (set_scope) {
3843                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3844                                         stcb->asoc.scope.loopback_scope = 1;
3845                                         stcb->asoc.scope.local_scope = 0;
3846                                         stcb->asoc.scope.ipv4_local_scope = 1;
3847                                         stcb->asoc.scope.site_scope = 1;
3848                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3849                                         /*
3850                                          * If the new destination is a
3851                                          * LINK_LOCAL we must have common
3852                                          * site scope. Don't set the local
3853                                          * scope since we may not share all
3854                                          * links, only loopback can do this.
3855                                          * Links on the local network would
3856                                          * also be on our private network
3857                                          * for v4 too.
3858                                          */
3859                                         stcb->asoc.scope.ipv4_local_scope = 1;
3860                                         stcb->asoc.scope.site_scope = 1;
3861                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3862                                         /*
3863                                          * If the new destination is
3864                                          * SITE_LOCAL then we must have site
3865                                          * scope in common.
3866                                          */
3867                                         stcb->asoc.scope.site_scope = 1;
3868                                 }
3869                         } else {
3870                                 /* Validate the address is in scope */
3871                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3872                                     (stcb->asoc.scope.loopback_scope == 0)) {
3873                                         addr_inscope = 0;
3874                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3875                                     (stcb->asoc.scope.local_scope == 0)) {
3876                                         addr_inscope = 0;
3877                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3878                                     (stcb->asoc.scope.site_scope == 0)) {
3879                                         addr_inscope = 0;
3880                                 }
3881                         }
3882                         break;
3883                 }
3884 #endif
3885         default:
3886                 /* not supported family type */
3887                 return (-1);
3888         }
3889         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3890         if (net == NULL) {
3891                 return (-1);
3892         }
3893         SCTP_INCR_RADDR_COUNT();
3894         bzero(net, sizeof(struct sctp_nets));
3895         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3896         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3897         switch (newaddr->sa_family) {
3898 #ifdef INET
3899         case AF_INET:
3900                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3901                 break;
3902 #endif
3903 #ifdef INET6
3904         case AF_INET6:
3905                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3906                 break;
3907 #endif
3908         default:
3909                 break;
3910         }
3911         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3912         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3913                 stcb->asoc.scope.loopback_scope = 1;
3914                 stcb->asoc.scope.ipv4_local_scope = 1;
3915                 stcb->asoc.scope.local_scope = 0;
3916                 stcb->asoc.scope.site_scope = 1;
3917                 addr_inscope = 1;
3918         }
3919         net->failure_threshold = stcb->asoc.def_net_failure;
3920         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3921         if (addr_inscope == 0) {
3922                 net->dest_state = (SCTP_ADDR_REACHABLE |
3923                     SCTP_ADDR_OUT_OF_SCOPE);
3924         } else {
3925                 if (from == SCTP_ADDR_IS_CONFIRMED)
3926                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3927                         net->dest_state = SCTP_ADDR_REACHABLE;
3928                 else
3929                         net->dest_state = SCTP_ADDR_REACHABLE |
3930                             SCTP_ADDR_UNCONFIRMED;
3931         }
3932         /*
3933          * We set this to 0, the timer code knows that this means its an
3934          * initial value
3935          */
3936         net->rto_needed = 1;
3937         net->RTO = 0;
3938         net->RTO_measured = 0;
3939         stcb->asoc.numnets++;
3940         net->ref_count = 1;
3941         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3942         net->port = stcb->asoc.port;
3943         net->dscp = stcb->asoc.default_dscp;
3944 #ifdef INET6
3945         net->flowlabel = stcb->asoc.default_flowlabel;
3946 #endif
3947         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3948                 net->dest_state |= SCTP_ADDR_NOHB;
3949         } else {
3950                 net->dest_state &= ~SCTP_ADDR_NOHB;
3951         }
3952         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3953                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3954         } else {
3955                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3956         }
3957         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3958         /* Init the timer structure */
3959         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3960         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3961         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3962
3963         /* Now generate a route for this guy */
3964 #ifdef INET6
3965         /* KAME hack: embed scopeid */
3966         if (newaddr->sa_family == AF_INET6) {
3967                 struct sockaddr_in6 *sin6;
3968
3969                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3970                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3971                 sin6->sin6_scope_id = 0;
3972         }
3973 #endif
3974         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3975
3976         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3977                 /* Get source address */
3978                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3979                     stcb,
3980                     (sctp_route_t *) & net->ro,
3981                     net,
3982                     0,
3983                     stcb->asoc.vrf_id);
3984                 if (net->ro._s_addr != NULL) {
3985                         net->src_addr_selected = 1;
3986                         /* Now get the interface MTU */
3987                         if (net->ro._s_addr->ifn_p != NULL) {
3988                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3989                         }
3990                 } else {
3991                         net->src_addr_selected = 0;
3992                 }
3993                 if (net->mtu > 0) {
3994                         uint32_t rmtu;
3995
3996                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3997                         if (rmtu == 0) {
3998                                 /*
3999                                  * Start things off to match mtu of
4000                                  * interface please.
4001                                  */
4002                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4003                                     net->ro.ro_rt, net->mtu);
4004                         } else {
4005                                 /*
4006                                  * we take the route mtu over the interface,
4007                                  * since the route may be leading out the
4008                                  * loopback, or a different interface.
4009                                  */
4010                                 net->mtu = rmtu;
4011                         }
4012                 }
4013         } else {
4014                 net->src_addr_selected = 0;
4015         }
4016         if (net->mtu == 0) {
4017                 switch (newaddr->sa_family) {
4018 #ifdef INET
4019                 case AF_INET:
4020                         net->mtu = SCTP_DEFAULT_MTU;
4021                         break;
4022 #endif
4023 #ifdef INET6
4024                 case AF_INET6:
4025                         net->mtu = 1280;
4026                         break;
4027 #endif
4028                 default:
4029                         break;
4030                 }
4031         }
4032 #if defined(INET) || defined(INET6)
4033         if (net->port) {
4034                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4035         }
4036 #endif
4037         if (from == SCTP_ALLOC_ASOC) {
4038                 stcb->asoc.smallest_mtu = net->mtu;
4039         }
4040         if (stcb->asoc.smallest_mtu > net->mtu) {
4041                 stcb->asoc.smallest_mtu = net->mtu;
4042         }
4043 #ifdef INET6
4044         if (newaddr->sa_family == AF_INET6) {
4045                 struct sockaddr_in6 *sin6;
4046
4047                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4048                 (void)sa6_recoverscope(sin6);
4049         }
4050 #endif
4051
4052         /* JRS - Use the congestion control given in the CC module */
4053         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4054                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4055
4056         /*
4057          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4058          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4059          */
4060         net->find_pseudo_cumack = 1;
4061         net->find_rtx_pseudo_cumack = 1;
4062         /* Choose an initial flowid. */
4063         net->flowid = stcb->asoc.my_vtag ^
4064             ntohs(stcb->rport) ^
4065             ntohs(stcb->sctp_ep->sctp_lport);
4066 #ifdef INVARIANTS
4067         net->flowidset = 1;
4068 #endif
4069         if (netp) {
4070                 *netp = net;
4071         }
4072         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4073         if (net->ro.ro_rt == NULL) {
4074                 /* Since we have no route put it at the back */
4075                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4076         } else if (netfirst == NULL) {
4077                 /* We are the first one in the pool. */
4078                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4079         } else if (netfirst->ro.ro_rt == NULL) {
4080                 /*
4081                  * First one has NO route. Place this one ahead of the first
4082                  * one.
4083                  */
4084                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4085         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4086                 /*
4087                  * This one has a different interface than the one at the
4088                  * top of the list. Place it ahead.
4089                  */
4090                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4091         } else {
4092                 /*
4093                  * Ok we have the same interface as the first one. Move
4094                  * forward until we find either a) one with a NULL route...
4095                  * insert ahead of that b) one with a different ifp.. insert
4096                  * after that. c) end of the list.. insert at the tail.
4097                  */
4098                 struct sctp_nets *netlook;
4099
4100                 do {
4101                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4102                         if (netlook == NULL) {
4103                                 /* End of the list */
4104                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4105                                 break;
4106                         } else if (netlook->ro.ro_rt == NULL) {
4107                                 /* next one has NO route */
4108                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4109                                 break;
4110                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4111                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4112                                     net, sctp_next);
4113                                 break;
4114                         }
4115                         /* Shift forward */
4116                         netfirst = netlook;
4117                 } while (netlook != NULL);
4118         }
4119
4120         /* got to have a primary set */
4121         if (stcb->asoc.primary_destination == 0) {
4122                 stcb->asoc.primary_destination = net;
4123         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4124                     (net->ro.ro_rt) &&
4125             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4126                 /* No route to current primary adopt new primary */
4127                 stcb->asoc.primary_destination = net;
4128         }
4129         /* Validate primary is first */
4130         net = TAILQ_FIRST(&stcb->asoc.nets);
4131         if ((net != stcb->asoc.primary_destination) &&
4132             (stcb->asoc.primary_destination)) {
4133                 /*
4134                  * first one on the list is NOT the primary sctp_cmpaddr()
4135                  * is much more efficient if the primary is the first on the
4136                  * list, make it so.
4137                  */
4138                 TAILQ_REMOVE(&stcb->asoc.nets,
4139                     stcb->asoc.primary_destination, sctp_next);
4140                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4141                     stcb->asoc.primary_destination, sctp_next);
4142         }
4143         return (0);
4144 }
4145
4146
4147 static uint32_t
4148 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4149 {
4150         uint32_t id;
4151         struct sctpasochead *head;
4152         struct sctp_tcb *lstcb;
4153
4154         SCTP_INP_WLOCK(inp);
4155 try_again:
4156         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4157                 /* TSNH */
4158                 SCTP_INP_WUNLOCK(inp);
4159                 return (0);
4160         }
4161         /*
4162          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4163          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4164          */
4165         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4166                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4167         }
4168         id = inp->sctp_associd_counter;
4169         inp->sctp_associd_counter++;
4170         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4171         if (lstcb) {
4172                 goto try_again;
4173         }
4174         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4175         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4176         stcb->asoc.in_asocid_hash = 1;
4177         SCTP_INP_WUNLOCK(inp);
4178         return id;
4179 }
4180
4181 /*
4182  * allocate an association and add it to the endpoint. The caller must be
4183  * careful to add all additional addresses once they are know right away or
4184  * else the assoc will be may experience a blackout scenario.
4185  */
4186 struct sctp_tcb *
4187 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4188     int *error, uint32_t override_tag, uint32_t vrf_id,
4189     struct thread *p
4190 )
4191 {
4192         /* note the p argument is only valid in unbound sockets */
4193
4194         struct sctp_tcb *stcb;
4195         struct sctp_association *asoc;
4196         struct sctpasochead *head;
4197         uint16_t rport;
4198         int err;
4199
4200         /*
4201          * Assumption made here: Caller has done a
4202          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4203          * address does not exist already.
4204          */
4205         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4206                 /* Hit max assoc, sorry no more */
4207                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4208                 *error = ENOBUFS;
4209                 return (NULL);
4210         }
4211         if (firstaddr == NULL) {
4212                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4213                 *error = EINVAL;
4214                 return (NULL);
4215         }
4216         SCTP_INP_RLOCK(inp);
4217         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4218             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4219             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4220                 /*
4221                  * If its in the TCP pool, its NOT allowed to create an
4222                  * association. The parent listener needs to call
4223                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4224                  * off, or connected one does this.. its an error.
4225                  */
4226                 SCTP_INP_RUNLOCK(inp);
4227                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4228                 *error = EINVAL;
4229                 return (NULL);
4230         }
4231         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4232             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4233                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4234                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4235                         SCTP_INP_RUNLOCK(inp);
4236                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4237                         *error = EINVAL;
4238                         return (NULL);
4239                 }
4240         }
4241         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4242 #ifdef SCTP_DEBUG
4243         if (firstaddr) {
4244                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4245                 switch (firstaddr->sa_family) {
4246 #ifdef INET
4247                 case AF_INET:
4248                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4249                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4250                         break;
4251 #endif
4252 #ifdef INET6
4253                 case AF_INET6:
4254                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4255                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4256                         break;
4257 #endif
4258                 default:
4259                         break;
4260                 }
4261         } else {
4262                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4263         }
4264 #endif                          /* SCTP_DEBUG */
4265         switch (firstaddr->sa_family) {
4266 #ifdef INET
4267         case AF_INET:
4268                 {
4269                         struct sockaddr_in *sin;
4270
4271                         sin = (struct sockaddr_in *)firstaddr;
4272                         if ((ntohs(sin->sin_port) == 0) ||
4273                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4274                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4275                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4276                                 /* Invalid address */
4277                                 SCTP_INP_RUNLOCK(inp);
4278                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4279                                 *error = EINVAL;
4280                                 return (NULL);
4281                         }
4282                         rport = sin->sin_port;
4283                         break;
4284                 }
4285 #endif
4286 #ifdef INET6
4287         case AF_INET6:
4288                 {
4289                         struct sockaddr_in6 *sin6;
4290
4291                         sin6 = (struct sockaddr_in6 *)firstaddr;
4292                         if ((ntohs(sin6->sin6_port) == 0) ||
4293                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4294                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4295                                 /* Invalid address */
4296                                 SCTP_INP_RUNLOCK(inp);
4297                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4298                                 *error = EINVAL;
4299                                 return (NULL);
4300                         }
4301                         rport = sin6->sin6_port;
4302                         break;
4303                 }
4304 #endif
4305         default:
4306                 /* not supported family type */
4307                 SCTP_INP_RUNLOCK(inp);
4308                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4309                 *error = EINVAL;
4310                 return (NULL);
4311         }
4312         SCTP_INP_RUNLOCK(inp);
4313         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4314                 /*
4315                  * If you have not performed a bind, then we need to do the
4316                  * ephemeral bind for you.
4317                  */
4318                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4319                     (struct sockaddr *)NULL,
4320                     (struct sctp_ifa *)NULL,
4321                     p
4322                     ))) {
4323                         /* bind error, probably perm */
4324                         *error = err;
4325                         return (NULL);
4326                 }
4327         }
4328         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4329         if (stcb == NULL) {
4330                 /* out of memory? */
4331                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4332                 *error = ENOMEM;
4333                 return (NULL);
4334         }
4335         SCTP_INCR_ASOC_COUNT();
4336
4337         bzero(stcb, sizeof(*stcb));
4338         asoc = &stcb->asoc;
4339
4340         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4341         SCTP_TCB_LOCK_INIT(stcb);
4342         SCTP_TCB_SEND_LOCK_INIT(stcb);
4343         stcb->rport = rport;
4344         /* setup back pointer's */
4345         stcb->sctp_ep = inp;
4346         stcb->sctp_socket = inp->sctp_socket;
4347         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4348                 /* failed */
4349                 SCTP_TCB_LOCK_DESTROY(stcb);
4350                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4351                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4352                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4353                 SCTP_DECR_ASOC_COUNT();
4354                 *error = err;
4355                 return (NULL);
4356         }
4357         /* and the port */
4358         SCTP_INP_INFO_WLOCK();
4359         SCTP_INP_WLOCK(inp);
4360         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4361                 /* inpcb freed while alloc going on */
4362                 SCTP_TCB_LOCK_DESTROY(stcb);
4363                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4364                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4365                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4366                 SCTP_INP_WUNLOCK(inp);
4367                 SCTP_INP_INFO_WUNLOCK();
4368                 SCTP_DECR_ASOC_COUNT();
4369                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4370                 *error = EINVAL;
4371                 return (NULL);
4372         }
4373         SCTP_TCB_LOCK(stcb);
4374
4375         /* now that my_vtag is set, add it to the hash */
4376         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4377         /* put it in the bucket in the vtag hash of assoc's for the system */
4378         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4379         SCTP_INP_INFO_WUNLOCK();
4380
4381         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4382                 /* failure.. memory error? */
4383                 if (asoc->strmout) {
4384                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4385                         asoc->strmout = NULL;
4386                 }
4387                 if (asoc->mapping_array) {
4388                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4389                         asoc->mapping_array = NULL;
4390                 }
4391                 if (asoc->nr_mapping_array) {
4392                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4393                         asoc->nr_mapping_array = NULL;
4394                 }
4395                 SCTP_DECR_ASOC_COUNT();
4396                 SCTP_TCB_UNLOCK(stcb);
4397                 SCTP_TCB_LOCK_DESTROY(stcb);
4398                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4399                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4400                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4401                 SCTP_INP_WUNLOCK(inp);
4402                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4403                 *error = ENOBUFS;
4404                 return (NULL);
4405         }
4406         /* Init all the timers */
4407         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4408         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4409         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4410         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4411         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4412         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4413         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4414
4415         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4416         /* now file the port under the hash as well */
4417         if (inp->sctp_tcbhash != NULL) {
4418                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4419                     inp->sctp_hashmark)];
4420                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4421         }
4422         SCTP_INP_WUNLOCK(inp);
4423         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4424         return (stcb);
4425 }
4426
4427
4428 void
4429 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4430 {
4431         struct sctp_association *asoc;
4432
4433         asoc = &stcb->asoc;
4434         asoc->numnets--;
4435         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4436         if (net == asoc->primary_destination) {
4437                 /* Reset primary */
4438                 struct sctp_nets *lnet;
4439
4440                 lnet = TAILQ_FIRST(&asoc->nets);
4441                 /*
4442                  * Mobility adaptation Ideally, if deleted destination is
4443                  * the primary, it becomes a fast retransmission trigger by
4444                  * the subsequent SET PRIMARY. (by micchie)
4445                  */
4446                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4447                     SCTP_MOBILITY_BASE) ||
4448                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4449                     SCTP_MOBILITY_FASTHANDOFF)) {
4450                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4451                         if (asoc->deleted_primary != NULL) {
4452                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4453                                 goto out;
4454                         }
4455                         asoc->deleted_primary = net;
4456                         atomic_add_int(&net->ref_count, 1);
4457                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4458                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4459                         sctp_mobility_feature_on(stcb->sctp_ep,
4460                             SCTP_MOBILITY_PRIM_DELETED);
4461                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4462                             stcb->sctp_ep, stcb, NULL);
4463                 }
4464 out:
4465                 /* Try to find a confirmed primary */
4466                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4467         }
4468         if (net == asoc->last_data_chunk_from) {
4469                 /* Reset primary */
4470                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4471         }
4472         if (net == asoc->last_control_chunk_from) {
4473                 /* Clear net */
4474                 asoc->last_control_chunk_from = NULL;
4475         }
4476         if (net == stcb->asoc.alternate) {
4477                 sctp_free_remote_addr(stcb->asoc.alternate);
4478                 stcb->asoc.alternate = NULL;
4479         }
4480         sctp_free_remote_addr(net);
4481 }
4482
4483 /*
4484  * remove a remote endpoint address from an association, it will fail if the
4485  * address does not exist.
4486  */
4487 int
4488 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4489 {
4490         /*
4491          * Here we need to remove a remote address. This is quite simple, we
4492          * first find it in the list of address for the association
4493          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4494          * on that item. Note we do not allow it to be removed if there are
4495          * no other addresses.
4496          */
4497         struct sctp_association *asoc;
4498         struct sctp_nets *net, *nnet;
4499
4500         asoc = &stcb->asoc;
4501
4502         /* locate the address */
4503         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4504                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4505                         continue;
4506                 }
4507                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4508                     remaddr)) {
4509                         /* we found the guy */
4510                         if (asoc->numnets < 2) {
4511                                 /* Must have at LEAST two remote addresses */
4512                                 return (-1);
4513                         } else {
4514                                 sctp_remove_net(stcb, net);
4515                                 return (0);
4516                         }
4517                 }
4518         }
4519         /* not found. */
4520         return (-2);
4521 }
4522
4523 void
4524 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4525 {
4526         struct sctpvtaghead *chain;
4527         struct sctp_tagblock *twait_block;
4528         int found = 0;
4529         int i;
4530
4531         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4532         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4533                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4534                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4535                             (twait_block->vtag_block[i].lport == lport) &&
4536                             (twait_block->vtag_block[i].rport == rport)) {
4537                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4538                                 twait_block->vtag_block[i].v_tag = 0;
4539                                 twait_block->vtag_block[i].lport = 0;
4540                                 twait_block->vtag_block[i].rport = 0;
4541                                 found = 1;
4542                                 break;
4543                         }
4544                 }
4545                 if (found)
4546                         break;
4547         }
4548 }
4549
4550 int
4551 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4552 {
4553         struct sctpvtaghead *chain;
4554         struct sctp_tagblock *twait_block;
4555         int found = 0;
4556         int i;
4557
4558         SCTP_INP_INFO_WLOCK();
4559         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4560         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4561                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4562                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4563                             (twait_block->vtag_block[i].lport == lport) &&
4564                             (twait_block->vtag_block[i].rport == rport)) {
4565                                 found = 1;
4566                                 break;
4567                         }
4568                 }
4569                 if (found)
4570                         break;
4571         }
4572         SCTP_INP_INFO_WUNLOCK();
4573         return (found);
4574 }
4575
4576
4577 void
4578 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4579 {
4580         struct sctpvtaghead *chain;
4581         struct sctp_tagblock *twait_block;
4582         struct timeval now;
4583         int set, i;
4584
4585         if (time == 0) {
4586                 /* Its disabled */
4587                 return;
4588         }
4589         (void)SCTP_GETTIME_TIMEVAL(&now);
4590         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4591         set = 0;
4592         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4593                 /* Block(s) present, lets find space, and expire on the fly */
4594                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4595                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4596                             !set) {
4597                                 twait_block->vtag_block[i].tv_sec_at_expire =
4598                                     now.tv_sec + time;
4599                                 twait_block->vtag_block[i].v_tag = tag;
4600                                 twait_block->vtag_block[i].lport = lport;
4601                                 twait_block->vtag_block[i].rport = rport;
4602                                 set = 1;
4603                         } else if ((twait_block->vtag_block[i].v_tag) &&
4604                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4605                                 /* Audit expires this guy */
4606                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4607                                 twait_block->vtag_block[i].v_tag = 0;
4608                                 twait_block->vtag_block[i].lport = 0;
4609                                 twait_block->vtag_block[i].rport = 0;
4610                                 if (set == 0) {
4611                                         /* Reuse it for my new tag */
4612                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4613                                         twait_block->vtag_block[i].v_tag = tag;
4614                                         twait_block->vtag_block[i].lport = lport;
4615                                         twait_block->vtag_block[i].rport = rport;
4616                                         set = 1;
4617                                 }
4618                         }
4619                 }
4620                 if (set) {
4621                         /*
4622                          * We only do up to the block where we can place our
4623                          * tag for audits
4624                          */
4625                         break;
4626                 }
4627         }
4628         /* Need to add a new block to chain */
4629         if (!set) {
4630                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4631                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4632                 if (twait_block == NULL) {
4633 #ifdef INVARIANTS
4634                         panic("Can not alloc tagblock");
4635 #endif
4636                         return;
4637                 }
4638                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4639                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4640                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4641                 twait_block->vtag_block[0].v_tag = tag;
4642                 twait_block->vtag_block[0].lport = lport;
4643                 twait_block->vtag_block[0].rport = rport;
4644         }
4645 }
4646
4647
4648
4649 /*-
4650  * Free the association after un-hashing the remote port. This
4651  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4652  * expect that the input to this function IS a locked TCB.
4653  * It will return 0, if it did NOT destroy the association (instead
4654  * it unlocks it. It will return NON-zero if it either destroyed the
4655  * association OR the association is already destroyed.
4656  */
4657 int
4658 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4659 {
4660         int i;
4661         struct sctp_association *asoc;
4662         struct sctp_nets *net, *nnet;
4663         struct sctp_laddr *laddr, *naddr;
4664         struct sctp_tmit_chunk *chk, *nchk;
4665         struct sctp_asconf_addr *aparam, *naparam;
4666         struct sctp_asconf_ack *aack, *naack;
4667         struct sctp_stream_reset_list *strrst, *nstrrst;
4668         struct sctp_queued_to_read *sq, *nsq;
4669         struct sctp_stream_queue_pending *sp, *nsp;
4670         sctp_sharedkey_t *shared_key, *nshared_key;
4671         struct socket *so;
4672
4673         /* first, lets purge the entry from the hash table. */
4674
4675 #ifdef SCTP_LOG_CLOSING
4676         sctp_log_closing(inp, stcb, 6);
4677 #endif
4678         if (stcb->asoc.state == 0) {
4679 #ifdef SCTP_LOG_CLOSING
4680                 sctp_log_closing(inp, NULL, 7);
4681 #endif
4682                 /* there is no asoc, really TSNH :-0 */
4683                 return (1);
4684         }
4685         if (stcb->asoc.alternate) {
4686                 sctp_free_remote_addr(stcb->asoc.alternate);
4687                 stcb->asoc.alternate = NULL;
4688         }
4689         /* TEMP CODE */
4690         if (stcb->freed_from_where == 0) {
4691                 /* Only record the first place free happened from */
4692                 stcb->freed_from_where = from_location;
4693         }
4694         /* TEMP CODE */
4695
4696         asoc = &stcb->asoc;
4697         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4698             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4699                 /* nothing around */
4700                 so = NULL;
4701         else
4702                 so = inp->sctp_socket;
4703
4704         /*
4705          * We used timer based freeing if a reader or writer is in the way.
4706          * So we first check if we are actually being called from a timer,
4707          * if so we abort early if a reader or writer is still in the way.
4708          */
4709         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4710             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4711                 /*
4712                  * is it the timer driving us? if so are the reader/writers
4713                  * gone?
4714                  */
4715                 if (stcb->asoc.refcnt) {
4716                         /* nope, reader or writer in the way */
4717                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4718                         /* no asoc destroyed */
4719                         SCTP_TCB_UNLOCK(stcb);
4720 #ifdef SCTP_LOG_CLOSING
4721                         sctp_log_closing(inp, stcb, 8);
4722 #endif
4723                         return (0);
4724                 }
4725         }
4726         /* now clean up any other timers */
4727         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4728         asoc->dack_timer.self = NULL;
4729         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4730         /*-
4731          * For stream reset we don't blast this unless
4732          * it is a str-reset timer, it might be the
4733          * free-asoc timer which we DON'T want to
4734          * disturb.
4735          */
4736         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4737                 asoc->strreset_timer.self = NULL;
4738         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4739         asoc->asconf_timer.self = NULL;
4740         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4741         asoc->autoclose_timer.self = NULL;
4742         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4743         asoc->shut_guard_timer.self = NULL;
4744         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4745         asoc->delayed_event_timer.self = NULL;
4746         /* Mobility adaptation */
4747         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4748         asoc->delete_prim_timer.self = NULL;
4749         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4750                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4751                 net->rxt_timer.self = NULL;
4752                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4753                 net->pmtu_timer.self = NULL;
4754                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4755                 net->hb_timer.self = NULL;
4756         }
4757         /* Now the read queue needs to be cleaned up (only once) */
4758         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4759                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4760                 SCTP_INP_READ_LOCK(inp);
4761                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4762                         if (sq->stcb == stcb) {
4763                                 sq->do_not_ref_stcb = 1;
4764                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4765                                 /*
4766                                  * If there is no end, there never will be
4767                                  * now.
4768                                  */
4769                                 if (sq->end_added == 0) {
4770                                         /* Held for PD-API clear that. */
4771                                         sq->pdapi_aborted = 1;
4772                                         sq->held_length = 0;
4773                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4774                                                 /*
4775                                                  * Need to add a PD-API
4776                                                  * aborted indication.
4777                                                  * Setting the control_pdapi
4778                                                  * assures that it will be
4779                                                  * added right after this
4780                                                  * msg.
4781                                                  */
4782                                                 uint32_t strseq;
4783
4784                                                 stcb->asoc.control_pdapi = sq;
4785                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4786                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4787                                                     stcb,
4788                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4789                                                     (void *)&strseq,
4790                                                     SCTP_SO_LOCKED);
4791                                                 stcb->asoc.control_pdapi = NULL;
4792                                         }
4793                                 }
4794                                 /* Add an end to wake them */
4795                                 sq->end_added = 1;
4796                         }
4797                 }
4798                 SCTP_INP_READ_UNLOCK(inp);
4799                 if (stcb->block_entry) {
4800                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4801                         stcb->block_entry->error = ECONNRESET;
4802                         stcb->block_entry = NULL;
4803                 }
4804         }
4805         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4806                 /*
4807                  * Someone holds a reference OR the socket is unaccepted
4808                  * yet.
4809                  */
4810                 if ((stcb->asoc.refcnt) ||
4811                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4812                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4813                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4814                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4815                 }
4816                 SCTP_TCB_UNLOCK(stcb);
4817                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4818                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4819                         /* nothing around */
4820                         so = NULL;
4821                 if (so) {
4822                         /* Wake any reader/writers */
4823                         sctp_sorwakeup(inp, so);
4824                         sctp_sowwakeup(inp, so);
4825                 }
4826 #ifdef SCTP_LOG_CLOSING
4827                 sctp_log_closing(inp, stcb, 9);
4828 #endif
4829                 /* no asoc destroyed */
4830                 return (0);
4831         }
4832 #ifdef SCTP_LOG_CLOSING
4833         sctp_log_closing(inp, stcb, 10);
4834 #endif
4835         /*
4836          * When I reach here, no others want to kill the assoc yet.. and I
4837          * own the lock. Now its possible an abort comes in when I do the
4838          * lock exchange below to grab all the locks to do the final take
4839          * out. to prevent this we increment the count, which will start a
4840          * timer and blow out above thus assuring us that we hold exclusive
4841          * killing of the asoc. Note that after getting back the TCB lock we
4842          * will go ahead and increment the counter back up and stop any
4843          * timer a passing stranger may have started :-S
4844          */
4845         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4846                 atomic_add_int(&stcb->asoc.refcnt, 1);
4847
4848                 SCTP_TCB_UNLOCK(stcb);
4849                 SCTP_INP_INFO_WLOCK();
4850                 SCTP_INP_WLOCK(inp);
4851                 SCTP_TCB_LOCK(stcb);
4852         }
4853         /* Double check the GONE flag */
4854         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4855             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4856                 /* nothing around */
4857                 so = NULL;
4858
4859         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4860             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4861                 /*
4862                  * For TCP type we need special handling when we are
4863                  * connected. We also include the peel'ed off ones to.
4864                  */
4865                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4866                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4867                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4868                         if (so) {
4869                                 SOCK_LOCK(so);
4870                                 if (so->so_rcv.sb_cc == 0) {
4871                                         so->so_state &= ~(SS_ISCONNECTING |
4872                                             SS_ISDISCONNECTING |
4873                                             SS_ISCONFIRMING |
4874                                             SS_ISCONNECTED);
4875                                 }
4876                                 socantrcvmore_locked(so);
4877                                 sctp_sowwakeup(inp, so);
4878                                 sctp_sorwakeup(inp, so);
4879                                 SCTP_SOWAKEUP(so);
4880                         }
4881                 }
4882         }
4883         /*
4884          * Make it invalid too, that way if its about to run it will abort
4885          * and return.
4886          */
4887         /* re-increment the lock */
4888         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4889                 atomic_add_int(&stcb->asoc.refcnt, -1);
4890         }
4891         if (stcb->asoc.refcnt) {
4892                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4893                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4894                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4895                         SCTP_INP_INFO_WUNLOCK();
4896                         SCTP_INP_WUNLOCK(inp);
4897                 }
4898                 SCTP_TCB_UNLOCK(stcb);
4899                 return (0);
4900         }
4901         asoc->state = 0;
4902         if (inp->sctp_tcbhash) {
4903                 LIST_REMOVE(stcb, sctp_tcbhash);
4904         }
4905         if (stcb->asoc.in_asocid_hash) {
4906                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4907         }
4908         /* Now lets remove it from the list of ALL associations in the EP */
4909         LIST_REMOVE(stcb, sctp_tcblist);
4910         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4911                 SCTP_INP_INCR_REF(inp);
4912                 SCTP_INP_WUNLOCK(inp);
4913         }
4914         /* pull from vtag hash */
4915         LIST_REMOVE(stcb, sctp_asocs);
4916         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4917             inp->sctp_lport, stcb->rport);
4918
4919         /*
4920          * Now restop the timers to be sure this is paranoia at is finest!
4921          */
4922         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4923         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4924         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4925         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4926         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4927         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4928         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4929         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4930                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4931                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4932                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4933         }
4934
4935         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4936         /*
4937          * The chunk lists and such SHOULD be empty but we check them just
4938          * in case.
4939          */
4940         /* anything on the wheel needs to be removed */
4941         for (i = 0; i < asoc->streamoutcnt; i++) {
4942                 struct sctp_stream_out *outs;
4943
4944                 outs = &asoc->strmout[i];
4945                 /* now clean up any chunks here */
4946                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4947                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4948                         sctp_free_spbufspace(stcb, asoc, sp);
4949                         if (sp->data) {
4950                                 if (so) {
4951                                         /* Still an open socket - report */
4952                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4953                                             0, (void *)sp, SCTP_SO_LOCKED);
4954                                 }
4955                                 if (sp->data) {
4956                                         sctp_m_freem(sp->data);
4957                                         sp->data = NULL;
4958                                         sp->tail_mbuf = NULL;
4959                                         sp->length = 0;
4960                                 }
4961                         }
4962                         if (sp->net) {
4963                                 sctp_free_remote_addr(sp->net);
4964                                 sp->net = NULL;
4965                         }
4966                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4967                 }
4968         }
4969         /* sa_ignore FREED_MEMORY */
4970         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4971                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4972                 SCTP_FREE(strrst, SCTP_M_STRESET);
4973         }
4974         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4975                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4976                 if (sq->data) {
4977                         sctp_m_freem(sq->data);
4978                         sq->data = NULL;
4979                 }
4980                 sctp_free_remote_addr(sq->whoFrom);
4981                 sq->whoFrom = NULL;
4982                 sq->stcb = NULL;
4983                 /* Free the ctl entry */
4984                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4985                 SCTP_DECR_READQ_COUNT();
4986                 /* sa_ignore FREED_MEMORY */
4987         }
4988         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4989                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4990                 if (chk->data) {
4991                         sctp_m_freem(chk->data);
4992                         chk->data = NULL;
4993                 }
4994                 if (chk->holds_key_ref)
4995                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4996                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4997                 SCTP_DECR_CHK_COUNT();
4998                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4999                 asoc->free_chunk_cnt--;
5000                 /* sa_ignore FREED_MEMORY */
5001         }
5002         /* pending send queue SHOULD be empty */
5003         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5004                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5005                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5006 #ifdef INVARIANTS
5007                 } else {
5008                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5009 #endif
5010                 }
5011                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5012                 if (chk->data) {
5013                         if (so) {
5014                                 /* Still a socket? */
5015                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5016                                     0, chk, SCTP_SO_LOCKED);
5017                         }
5018                         if (chk->data) {
5019                                 sctp_m_freem(chk->data);
5020                                 chk->data = NULL;
5021                         }
5022                 }
5023                 if (chk->holds_key_ref)
5024                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5025                 if (chk->whoTo) {
5026                         sctp_free_remote_addr(chk->whoTo);
5027                         chk->whoTo = NULL;
5028                 }
5029                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5030                 SCTP_DECR_CHK_COUNT();
5031                 /* sa_ignore FREED_MEMORY */
5032         }
5033         /* sent queue SHOULD be empty */
5034         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5035                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5036                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5037                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5038 #ifdef INVARIANTS
5039                         } else {
5040                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5041 #endif
5042                         }
5043                 }
5044                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5045                 if (chk->data) {
5046                         if (so) {
5047                                 /* Still a socket? */
5048                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5049                                     0, chk, SCTP_SO_LOCKED);
5050                         }
5051                         if (chk->data) {
5052                                 sctp_m_freem(chk->data);
5053                                 chk->data = NULL;
5054                         }
5055                 }
5056                 if (chk->holds_key_ref)
5057                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5058                 sctp_free_remote_addr(chk->whoTo);
5059                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5060                 SCTP_DECR_CHK_COUNT();
5061                 /* sa_ignore FREED_MEMORY */
5062         }
5063 #ifdef INVARIANTS
5064         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5065                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5066                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5067                 }
5068         }
5069 #endif
5070         /* control queue MAY not be empty */
5071         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5072                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5073                 if (chk->data) {
5074                         sctp_m_freem(chk->data);
5075                         chk->data = NULL;
5076                 }
5077                 if (chk->holds_key_ref)
5078                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5079                 sctp_free_remote_addr(chk->whoTo);
5080                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5081                 SCTP_DECR_CHK_COUNT();
5082                 /* sa_ignore FREED_MEMORY */
5083         }
5084         /* ASCONF queue MAY not be empty */
5085         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5086                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5087                 if (chk->data) {
5088                         sctp_m_freem(chk->data);
5089                         chk->data = NULL;
5090                 }
5091                 if (chk->holds_key_ref)
5092                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5093                 sctp_free_remote_addr(chk->whoTo);
5094                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5095                 SCTP_DECR_CHK_COUNT();
5096                 /* sa_ignore FREED_MEMORY */
5097         }
5098         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5099                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5100                 if (chk->data) {
5101                         sctp_m_freem(chk->data);
5102                         chk->data = NULL;
5103                 }
5104                 if (chk->holds_key_ref)
5105                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5106                 sctp_free_remote_addr(chk->whoTo);
5107                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5108                 SCTP_DECR_CHK_COUNT();
5109                 /* sa_ignore FREED_MEMORY */
5110         }
5111
5112         if (asoc->mapping_array) {
5113                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5114                 asoc->mapping_array = NULL;
5115         }
5116         if (asoc->nr_mapping_array) {
5117                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5118                 asoc->nr_mapping_array = NULL;
5119         }
5120         /* the stream outs */
5121         if (asoc->strmout) {
5122                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5123                 asoc->strmout = NULL;
5124         }
5125         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5126         if (asoc->strmin) {
5127                 struct sctp_queued_to_read *ctl, *nctl;
5128
5129                 for (i = 0; i < asoc->streamincnt; i++) {
5130                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5131                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5132                                 sctp_free_remote_addr(ctl->whoFrom);
5133                                 if (ctl->data) {
5134                                         sctp_m_freem(ctl->data);
5135                                         ctl->data = NULL;
5136                                 }
5137                                 /*
5138                                  * We don't free the address here since all
5139                                  * the net's were freed above.
5140                                  */
5141                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5142                                 SCTP_DECR_READQ_COUNT();
5143                         }
5144                 }
5145                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5146                 asoc->strmin = NULL;
5147         }
5148         asoc->streamincnt = 0;
5149         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5150 #ifdef INVARIANTS
5151                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5152                         panic("no net's left alloc'ed, or list points to itself");
5153                 }
5154 #endif
5155                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5156                 sctp_free_remote_addr(net);
5157         }
5158         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5159                 /* sa_ignore FREED_MEMORY */
5160                 sctp_remove_laddr(laddr);
5161         }
5162
5163         /* pending asconf (address) parameters */
5164         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5165                 /* sa_ignore FREED_MEMORY */
5166                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5167                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5168         }
5169         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5170                 /* sa_ignore FREED_MEMORY */
5171                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5172                 if (aack->data != NULL) {
5173                         sctp_m_freem(aack->data);
5174                 }
5175                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5176         }
5177         /* clean up auth stuff */
5178         if (asoc->local_hmacs)
5179                 sctp_free_hmaclist(asoc->local_hmacs);
5180         if (asoc->peer_hmacs)
5181                 sctp_free_hmaclist(asoc->peer_hmacs);
5182
5183         if (asoc->local_auth_chunks)
5184                 sctp_free_chunklist(asoc->local_auth_chunks);
5185         if (asoc->peer_auth_chunks)
5186                 sctp_free_chunklist(asoc->peer_auth_chunks);
5187
5188         sctp_free_authinfo(&asoc->authinfo);
5189
5190         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5191                 LIST_REMOVE(shared_key, next);
5192                 sctp_free_sharedkey(shared_key);
5193                 /* sa_ignore FREED_MEMORY */
5194         }
5195
5196         /* Insert new items here :> */
5197
5198         /* Get rid of LOCK */
5199         SCTP_TCB_UNLOCK(stcb);
5200         SCTP_TCB_LOCK_DESTROY(stcb);
5201         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5202         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5203                 SCTP_INP_INFO_WUNLOCK();
5204                 SCTP_INP_RLOCK(inp);
5205         }
5206 #ifdef SCTP_TRACK_FREED_ASOCS
5207         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5208                 /* now clean up the tasoc itself */
5209                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5210                 SCTP_DECR_ASOC_COUNT();
5211         } else {
5212                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5213         }
5214 #else
5215         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5216         SCTP_DECR_ASOC_COUNT();
5217 #endif
5218         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5219                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5220                         /*
5221                          * If its NOT the inp_free calling us AND sctp_close
5222                          * as been called, we call back...
5223                          */
5224                         SCTP_INP_RUNLOCK(inp);
5225                         /*
5226                          * This will start the kill timer (if we are the
5227                          * last one) since we hold an increment yet. But
5228                          * this is the only safe way to do this since
5229                          * otherwise if the socket closes at the same time
5230                          * we are here we might collide in the cleanup.
5231                          */
5232                         sctp_inpcb_free(inp,
5233                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5234                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5235                         SCTP_INP_DECR_REF(inp);
5236                         goto out_of;
5237                 } else {
5238                         /* The socket is still open. */
5239                         SCTP_INP_DECR_REF(inp);
5240                 }
5241         }
5242         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5243                 SCTP_INP_RUNLOCK(inp);
5244         }
5245 out_of:
5246         /* destroyed the asoc */
5247 #ifdef SCTP_LOG_CLOSING
5248         sctp_log_closing(inp, NULL, 11);
5249 #endif
5250         return (1);
5251 }
5252
5253
5254
5255 /*
5256  * determine if a destination is "reachable" based upon the addresses bound
5257  * to the current endpoint (e.g. only v4 or v6 currently bound)
5258  */
5259 /*
5260  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5261  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5262  * types bound as its endpoint
5263  */
5264 int
5265 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5266 {
5267         struct sctp_inpcb *inp;
5268         int answer;
5269
5270         /*
5271          * No locks here, the TCB, in all cases is already locked and an
5272          * assoc is up. There is either a INP lock by the caller applied (in
5273          * asconf case when deleting an address) or NOT in the HB case,
5274          * however if HB then the INP increment is up and the INP will not
5275          * be removed (on top of the fact that we have a TCB lock). So we
5276          * only want to read the sctp_flags, which is either bound-all or
5277          * not.. no protection needed since once an assoc is up you can't be
5278          * changing your binding.
5279          */
5280         inp = stcb->sctp_ep;
5281         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5282                 /* if bound all, destination is not restricted */
5283                 /*
5284                  * RRS: Question during lock work: Is this correct? If you
5285                  * are bound-all you still might need to obey the V4--V6
5286                  * flags??? IMO this bound-all stuff needs to be removed!
5287                  */
5288                 return (1);
5289         }
5290         /* NOTE: all "scope" checks are done when local addresses are added */
5291         switch (destaddr->sa_family) {
5292 #ifdef INET6
5293         case AF_INET6:
5294                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5295                 break;
5296 #endif
5297 #ifdef INET
5298         case AF_INET:
5299                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5300                 break;
5301 #endif
5302         default:
5303                 /* invalid family, so it's unreachable */
5304                 answer = 0;
5305                 break;
5306         }
5307         return (answer);
5308 }
5309
5310 /*
5311  * update the inp_vflags on an endpoint
5312  */
5313 static void
5314 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5315 {
5316         struct sctp_laddr *laddr;
5317
5318         /* first clear the flag */
5319         inp->ip_inp.inp.inp_vflag = 0;
5320         /* set the flag based on addresses on the ep list */
5321         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5322                 if (laddr->ifa == NULL) {
5323                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5324                             __FUNCTION__);
5325                         continue;
5326                 }
5327                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5328                         continue;
5329                 }
5330                 switch (laddr->ifa->address.sa.sa_family) {
5331 #ifdef INET6
5332                 case AF_INET6:
5333                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5334                         break;
5335 #endif
5336 #ifdef INET
5337                 case AF_INET:
5338                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5339                         break;
5340 #endif
5341                 default:
5342                         break;
5343                 }
5344         }
5345 }
5346
5347 /*
5348  * Add the address to the endpoint local address list There is nothing to be
5349  * done if we are bound to all addresses
5350  */
5351 void
5352 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5353 {
5354         struct sctp_laddr *laddr;
5355         int fnd, error = 0;
5356
5357         fnd = 0;
5358
5359         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5360                 /* You are already bound to all. You have it already */
5361                 return;
5362         }
5363 #ifdef INET6
5364         if (ifa->address.sa.sa_family == AF_INET6) {
5365                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5366                         /* Can't bind a non-useable addr. */
5367                         return;
5368                 }
5369         }
5370 #endif
5371         /* first, is it already present? */
5372         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5373                 if (laddr->ifa == ifa) {
5374                         fnd = 1;
5375                         break;
5376                 }
5377         }
5378
5379         if (fnd == 0) {
5380                 /* Not in the ep list */
5381                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5382                 if (error != 0)
5383                         return;
5384                 inp->laddr_count++;
5385                 /* update inp_vflag flags */
5386                 switch (ifa->address.sa.sa_family) {
5387 #ifdef INET6
5388                 case AF_INET6:
5389                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5390                         break;
5391 #endif
5392 #ifdef INET
5393                 case AF_INET:
5394                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5395                         break;
5396 #endif
5397                 default:
5398                         break;
5399                 }
5400         }
5401         return;
5402 }
5403
5404
5405 /*
5406  * select a new (hopefully reachable) destination net (should only be used
5407  * when we deleted an ep addr that is the only usable source address to reach
5408  * the destination net)
5409  */
5410 static void
5411 sctp_select_primary_destination(struct sctp_tcb *stcb)
5412 {
5413         struct sctp_nets *net;
5414
5415         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5416                 /* for now, we'll just pick the first reachable one we find */
5417                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5418                         continue;
5419                 if (sctp_destination_is_reachable(stcb,
5420                     (struct sockaddr *)&net->ro._l_addr)) {
5421                         /* found a reachable destination */
5422                         stcb->asoc.primary_destination = net;
5423                 }
5424         }
5425         /* I can't there from here! ...we're gonna die shortly... */
5426 }
5427
5428
5429 /*
5430  * Delete the address from the endpoint local address list There is nothing
5431  * to be done if we are bound to all addresses
5432  */
5433 void
5434 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5435 {
5436         struct sctp_laddr *laddr;
5437         int fnd;
5438
5439         fnd = 0;
5440         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5441                 /* You are already bound to all. You have it already */
5442                 return;
5443         }
5444         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5445                 if (laddr->ifa == ifa) {
5446                         fnd = 1;
5447                         break;
5448                 }
5449         }
5450         if (fnd && (inp->laddr_count < 2)) {
5451                 /* can't delete unless there are at LEAST 2 addresses */
5452                 return;
5453         }
5454         if (fnd) {
5455                 /*
5456                  * clean up any use of this address go through our
5457                  * associations and clear any last_used_address that match
5458                  * this one for each assoc, see if a new primary_destination
5459                  * is needed
5460                  */
5461                 struct sctp_tcb *stcb;
5462
5463                 /* clean up "next_addr_touse" */
5464                 if (inp->next_addr_touse == laddr)
5465                         /* delete this address */
5466                         inp->next_addr_touse = NULL;
5467
5468                 /* clean up "last_used_address" */
5469                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5470                         struct sctp_nets *net;
5471
5472                         SCTP_TCB_LOCK(stcb);
5473                         if (stcb->asoc.last_used_address == laddr)
5474                                 /* delete this address */
5475                                 stcb->asoc.last_used_address = NULL;
5476                         /*
5477                          * Now spin through all the nets and purge any ref
5478                          * to laddr
5479                          */
5480                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5481                                 if (net->ro._s_addr &&
5482                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5483                                         /* Yep, purge src address selected */
5484                                         sctp_rtentry_t *rt;
5485
5486                                         /* delete this address if cached */
5487                                         rt = net->ro.ro_rt;
5488                                         if (rt != NULL) {
5489                                                 RTFREE(rt);
5490                                                 net->ro.ro_rt = NULL;
5491                                         }
5492                                         sctp_free_ifa(net->ro._s_addr);
5493                                         net->ro._s_addr = NULL;
5494                                         net->src_addr_selected = 0;
5495                                 }
5496                         }
5497                         SCTP_TCB_UNLOCK(stcb);
5498                 }               /* for each tcb */
5499                 /* remove it from the ep list */
5500                 sctp_remove_laddr(laddr);
5501                 inp->laddr_count--;
5502                 /* update inp_vflag flags */
5503                 sctp_update_ep_vflag(inp);
5504         }
5505         return;
5506 }
5507
5508 /*
5509  * Add the address to the TCB local address restricted list.
5510  * This is a "pending" address list (eg. addresses waiting for an
5511  * ASCONF-ACK response) and cannot be used as a valid source address.
5512  */
5513 void
5514 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5515 {
5516         struct sctp_laddr *laddr;
5517         struct sctpladdr *list;
5518
5519         /*
5520          * Assumes TCB is locked.. and possibly the INP. May need to
5521          * confirm/fix that if we need it and is not the case.
5522          */
5523         list = &stcb->asoc.sctp_restricted_addrs;
5524
5525 #ifdef INET6
5526         if (ifa->address.sa.sa_family == AF_INET6) {
5527                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5528                         /* Can't bind a non-existent addr. */
5529                         return;
5530                 }
5531         }
5532 #endif
5533         /* does the address already exist? */
5534         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5535                 if (laddr->ifa == ifa) {
5536                         return;
5537                 }
5538         }
5539
5540         /* add to the list */
5541         (void)sctp_insert_laddr(list, ifa, 0);
5542         return;
5543 }
5544
5545 /*
5546  * insert an laddr entry with the given ifa for the desired list
5547  */
5548 int
5549 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5550 {
5551         struct sctp_laddr *laddr;
5552
5553         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5554         if (laddr == NULL) {
5555                 /* out of memory? */
5556                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5557                 return (EINVAL);
5558         }
5559         SCTP_INCR_LADDR_COUNT();
5560         bzero(laddr, sizeof(*laddr));
5561         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5562         laddr->ifa = ifa;
5563         laddr->action = act;
5564         atomic_add_int(&ifa->refcount, 1);
5565         /* insert it */
5566         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5567
5568         return (0);
5569 }
5570
5571 /*
5572  * Remove an laddr entry from the local address list (on an assoc)
5573  */
5574 void
5575 sctp_remove_laddr(struct sctp_laddr *laddr)
5576 {
5577
5578         /* remove from the list */
5579         LIST_REMOVE(laddr, sctp_nxt_addr);
5580         sctp_free_ifa(laddr->ifa);
5581         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5582         SCTP_DECR_LADDR_COUNT();
5583 }
5584
5585 /*
5586  * Remove a local address from the TCB local address restricted list
5587  */
5588 void
5589 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5590 {
5591         struct sctp_inpcb *inp;
5592         struct sctp_laddr *laddr;
5593
5594         /*
5595          * This is called by asconf work. It is assumed that a) The TCB is
5596          * locked and b) The INP is locked. This is true in as much as I can
5597          * trace through the entry asconf code where I did these locks.
5598          * Again, the ASCONF code is a bit different in that it does lock
5599          * the INP during its work often times. This must be since we don't
5600          * want other proc's looking up things while what they are looking
5601          * up is changing :-D
5602          */
5603
5604         inp = stcb->sctp_ep;
5605         /* if subset bound and don't allow ASCONF's, can't delete last */
5606         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5607             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5608                 if (stcb->sctp_ep->laddr_count < 2) {
5609                         /* can't delete last address */
5610                         return;
5611                 }
5612         }
5613         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5614                 /* remove the address if it exists */
5615                 if (laddr->ifa == NULL)
5616                         continue;
5617                 if (laddr->ifa == ifa) {
5618                         sctp_remove_laddr(laddr);
5619                         return;
5620                 }
5621         }
5622
5623         /* address not found! */
5624         return;
5625 }
5626
5627 /*
5628  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5629  */
5630 /* sysctl */
5631 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5632 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5633
5634
5635
5636 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5637 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5638 int *sctp_cpuarry = NULL;
5639 void
5640 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5641 {
5642         /* Queue a packet to a processor for the specified core */
5643         struct sctp_mcore_queue *qent;
5644         struct sctp_mcore_ctrl *wkq;
5645         int need_wake = 0;
5646
5647         if (sctp_mcore_workers == NULL) {
5648                 /* Something went way bad during setup */
5649                 sctp_input_with_port(m, off, 0);
5650                 return;
5651         }
5652         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5653             (sizeof(struct sctp_mcore_queue)),
5654             SCTP_M_MCORE);
5655         if (qent == NULL) {
5656                 /* This is trouble  */
5657                 sctp_input_with_port(m, off, 0);
5658                 return;
5659         }
5660         qent->vn = curvnet;
5661         qent->m = m;
5662         qent->off = off;
5663         qent->v6 = 0;
5664         wkq = &sctp_mcore_workers[cpu_to_use];
5665         SCTP_MCORE_QLOCK(wkq);
5666
5667         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5668         if (wkq->running == 0) {
5669                 need_wake = 1;
5670         }
5671         SCTP_MCORE_QUNLOCK(wkq);
5672         if (need_wake) {
5673                 wakeup(&wkq->running);
5674         }
5675 }
5676
5677 static void
5678 sctp_mcore_thread(void *arg)
5679 {
5680
5681         struct sctp_mcore_ctrl *wkq;
5682         struct sctp_mcore_queue *qent;
5683
5684         wkq = (struct sctp_mcore_ctrl *)arg;
5685         struct mbuf *m;
5686         int off, v6;
5687
5688         /* Wait for first tickle */
5689         SCTP_MCORE_LOCK(wkq);
5690         wkq->running = 0;
5691         msleep(&wkq->running,
5692             &wkq->core_mtx,
5693             0, "wait for pkt", 0);
5694         SCTP_MCORE_UNLOCK(wkq);
5695
5696         /* Bind to our cpu */
5697         thread_lock(curthread);
5698         sched_bind(curthread, wkq->cpuid);
5699         thread_unlock(curthread);
5700
5701         /* Now lets start working */
5702         SCTP_MCORE_LOCK(wkq);
5703         /* Now grab lock and go */
5704         for (;;) {
5705                 SCTP_MCORE_QLOCK(wkq);
5706 skip_sleep:
5707                 wkq->running = 1;
5708                 qent = TAILQ_FIRST(&wkq->que);
5709                 if (qent) {
5710                         TAILQ_REMOVE(&wkq->que, qent, next);
5711                         SCTP_MCORE_QUNLOCK(wkq);
5712                         CURVNET_SET(qent->vn);
5713                         m = qent->m;
5714                         off = qent->off;
5715                         v6 = qent->v6;
5716                         SCTP_FREE(qent, SCTP_M_MCORE);
5717                         if (v6 == 0) {
5718                                 sctp_input_with_port(m, off, 0);
5719                         } else {
5720                                 SCTP_PRINTF("V6 not yet supported\n");
5721                                 sctp_m_freem(m);
5722                         }
5723                         CURVNET_RESTORE();
5724                         SCTP_MCORE_QLOCK(wkq);
5725                 }
5726                 wkq->running = 0;
5727                 if (!TAILQ_EMPTY(&wkq->que)) {
5728                         goto skip_sleep;
5729                 }
5730                 SCTP_MCORE_QUNLOCK(wkq);
5731                 msleep(&wkq->running,
5732                     &wkq->core_mtx,
5733                     0, "wait for pkt", 0);
5734         }
5735 }
5736
5737 static void
5738 sctp_startup_mcore_threads(void)
5739 {
5740         int i, cpu;
5741
5742         if (mp_ncpus == 1)
5743                 return;
5744
5745         if (sctp_mcore_workers != NULL) {
5746                 /*
5747                  * Already been here in some previous vnet?
5748                  */
5749                 return;
5750         }
5751         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5752             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5753             SCTP_M_MCORE);
5754         if (sctp_mcore_workers == NULL) {
5755                 /* TSNH I hope */
5756                 return;
5757         }
5758         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5759             sizeof(struct sctp_mcore_ctrl)));
5760         /* Init the structures */
5761         for (i = 0; i <= mp_maxid; i++) {
5762                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5763                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5764                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5765                 sctp_mcore_workers[i].cpuid = i;
5766         }
5767         if (sctp_cpuarry == NULL) {
5768                 SCTP_MALLOC(sctp_cpuarry, int *,
5769                     (mp_ncpus * sizeof(int)),
5770                     SCTP_M_MCORE);
5771                 i = 0;
5772                 CPU_FOREACH(cpu) {
5773                         sctp_cpuarry[i] = cpu;
5774                         i++;
5775                 }
5776         }
5777         /* Now start them all */
5778         CPU_FOREACH(cpu) {
5779                 (void)kproc_create(sctp_mcore_thread,
5780                     (void *)&sctp_mcore_workers[cpu],
5781                     &sctp_mcore_workers[cpu].thread_proc,
5782                     RFPROC,
5783                     SCTP_KTHREAD_PAGES,
5784                     SCTP_MCORE_NAME);
5785
5786         }
5787 }
5788
5789 #endif
5790
5791 void
5792 sctp_pcb_init()
5793 {
5794         /*
5795          * SCTP initialization for the PCB structures should be called by
5796          * the sctp_init() funciton.
5797          */
5798         int i;
5799         struct timeval tv;
5800
5801         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5802                 /* error I was called twice */
5803                 return;
5804         }
5805         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5806
5807 #if defined(SCTP_LOCAL_TRACE_BUF)
5808         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5809 #endif
5810 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5811         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5812             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5813             SCTP_M_MCORE);
5814 #endif
5815         (void)SCTP_GETTIME_TIMEVAL(&tv);
5816 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5817         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5818         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5819         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5820 #else
5821         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5822         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5823         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5824 #endif
5825         /* init the empty list of (All) Endpoints */
5826         LIST_INIT(&SCTP_BASE_INFO(listhead));
5827
5828
5829         /* init the hash table of endpoints */
5830         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5831         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5832         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5833         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5834             &SCTP_BASE_INFO(hashasocmark));
5835         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5836             &SCTP_BASE_INFO(hashmark));
5837         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5838             &SCTP_BASE_INFO(hashtcpmark));
5839         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5840
5841
5842         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5843             &SCTP_BASE_INFO(hashvrfmark));
5844
5845         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5846             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5847         /* init the zones */
5848         /*
5849          * FIX ME: Should check for NULL returns, but if it does fail we are
5850          * doomed to panic anyways... add later maybe.
5851          */
5852         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5853             sizeof(struct sctp_inpcb), maxsockets);
5854
5855         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5856             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5857
5858         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5859             sizeof(struct sctp_laddr),
5860             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5861
5862         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5863             sizeof(struct sctp_nets),
5864             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5865
5866         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5867             sizeof(struct sctp_tmit_chunk),
5868             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5869
5870         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5871             sizeof(struct sctp_queued_to_read),
5872             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5873
5874         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5875             sizeof(struct sctp_stream_queue_pending),
5876             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5877
5878         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5879             sizeof(struct sctp_asconf),
5880             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5881
5882         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5883             sizeof(struct sctp_asconf_ack),
5884             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5885
5886
5887         /* Master Lock INIT for info structure */
5888         SCTP_INP_INFO_LOCK_INIT();
5889         SCTP_STATLOG_INIT_LOCK();
5890
5891         SCTP_IPI_COUNT_INIT();
5892         SCTP_IPI_ADDR_INIT();
5893 #ifdef SCTP_PACKET_LOGGING
5894         SCTP_IP_PKTLOG_INIT();
5895 #endif
5896         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5897
5898         SCTP_WQ_ADDR_INIT();
5899         /* not sure if we need all the counts */
5900         SCTP_BASE_INFO(ipi_count_ep) = 0;
5901         /* assoc/tcb zone info */
5902         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5903         /* local addrlist zone info */
5904         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5905         /* remote addrlist zone info */
5906         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5907         /* chunk info */
5908         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5909
5910         /* socket queue zone info */
5911         SCTP_BASE_INFO(ipi_count_readq) = 0;
5912
5913         /* stream out queue cont */
5914         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5915
5916         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5917         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5918
5919         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5920
5921         /* Init the TIMEWAIT list */
5922         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5923                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5924         }
5925         sctp_startup_iterator();
5926
5927 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5928         sctp_startup_mcore_threads();
5929 #endif
5930
5931         /*
5932          * INIT the default VRF which for BSD is the only one, other O/S's
5933          * may have more. But initially they must start with one and then
5934          * add the VRF's as addresses are added.
5935          */
5936         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5937 }
5938
5939 /*
5940  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5941  */
5942 void
5943 sctp_pcb_finish(void)
5944 {
5945         struct sctp_vrflist *vrf_bucket;
5946         struct sctp_vrf *vrf, *nvrf;
5947         struct sctp_ifn *ifn, *nifn;
5948         struct sctp_ifa *ifa, *nifa;
5949         struct sctpvtaghead *chain;
5950         struct sctp_tagblock *twait_block, *prev_twait_block;
5951         struct sctp_laddr *wi, *nwi;
5952         int i;
5953         struct sctp_iterator *it, *nit;
5954
5955         /*
5956          * In FreeBSD the iterator thread never exits but we do clean up.
5957          * The only way FreeBSD reaches here is if we have VRF's but we
5958          * still add the ifdef to make it compile on old versions.
5959          */
5960         SCTP_IPI_ITERATOR_WQ_LOCK();
5961         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5962                 if (it->vn != curvnet) {
5963                         continue;
5964                 }
5965                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5966                 if (it->function_atend != NULL) {
5967                         (*it->function_atend) (it->pointer, it->val);
5968                 }
5969                 SCTP_FREE(it, SCTP_M_ITER);
5970         }
5971         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5972         SCTP_ITERATOR_LOCK();
5973         if ((sctp_it_ctl.cur_it) &&
5974             (sctp_it_ctl.cur_it->vn == curvnet)) {
5975                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5976         }
5977         SCTP_ITERATOR_UNLOCK();
5978         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5979         SCTP_WQ_ADDR_LOCK();
5980         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5981                 LIST_REMOVE(wi, sctp_nxt_addr);
5982                 SCTP_DECR_LADDR_COUNT();
5983                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5984         }
5985         SCTP_WQ_ADDR_UNLOCK();
5986
5987         /*
5988          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5989          * destroyed first).
5990          */
5991         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5992         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5993                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5994                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5995                                 /* free the ifa */
5996                                 LIST_REMOVE(ifa, next_bucket);
5997                                 LIST_REMOVE(ifa, next_ifa);
5998                                 SCTP_FREE(ifa, SCTP_M_IFA);
5999                         }
6000                         /* free the ifn */
6001                         LIST_REMOVE(ifn, next_bucket);
6002                         LIST_REMOVE(ifn, next_ifn);
6003                         SCTP_FREE(ifn, SCTP_M_IFN);
6004                 }
6005                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6006                 /* free the vrf */
6007                 LIST_REMOVE(vrf, next_vrf);
6008                 SCTP_FREE(vrf, SCTP_M_VRF);
6009         }
6010         /* free the vrf hashes */
6011         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6012         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6013
6014         /*
6015          * free the TIMEWAIT list elements malloc'd in the function
6016          * sctp_add_vtag_to_timewait()...
6017          */
6018         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6019                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6020                 if (!LIST_EMPTY(chain)) {
6021                         prev_twait_block = NULL;
6022                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6023                                 if (prev_twait_block) {
6024                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6025                                 }
6026                                 prev_twait_block = twait_block;
6027                         }
6028                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6029                 }
6030         }
6031
6032         /* free the locks and mutexes */
6033 #ifdef SCTP_PACKET_LOGGING
6034         SCTP_IP_PKTLOG_DESTROY();
6035 #endif
6036         SCTP_IPI_ADDR_DESTROY();
6037         SCTP_STATLOG_DESTROY();
6038         SCTP_INP_INFO_LOCK_DESTROY();
6039
6040         SCTP_WQ_ADDR_DESTROY();
6041
6042         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6043         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6044         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6045         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6046         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6047         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6048         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6049         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6050         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6051         /* Get rid of other stuff to */
6052         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6053                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6054         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6055                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6056         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6057                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6058 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6059         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6060 #endif
6061 }
6062
6063
6064 int
6065 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6066     int offset, int limit,
6067     struct sockaddr *src, struct sockaddr *dst,
6068     struct sockaddr *altsa)
6069 {
6070         /*
6071          * grub through the INIT pulling addresses and loading them to the
6072          * nets structure in the asoc. The from address in the mbuf should
6073          * also be loaded (if it is not already). This routine can be called
6074          * with either INIT or INIT-ACK's as long as the m points to the IP
6075          * packet and the offset points to the beginning of the parameters.
6076          */
6077         struct sctp_inpcb *inp;
6078         struct sctp_nets *net, *nnet, *net_tmp;
6079         struct sctp_paramhdr *phdr, parm_buf;
6080         struct sctp_tcb *stcb_tmp;
6081         uint16_t ptype, plen;
6082         struct sockaddr *sa;
6083         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6084         struct sctp_auth_random *p_random = NULL;
6085         uint16_t random_len = 0;
6086         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6087         struct sctp_auth_hmac_algo *hmacs = NULL;
6088         uint16_t hmacs_len = 0;
6089         uint8_t saw_asconf = 0;
6090         uint8_t saw_asconf_ack = 0;
6091         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6092         struct sctp_auth_chunk_list *chunks = NULL;
6093         uint16_t num_chunks = 0;
6094         sctp_key_t *new_key;
6095         uint32_t keylen;
6096         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6097         uint8_t peer_supports_ecn;
6098         uint8_t peer_supports_prsctp;
6099         uint8_t peer_supports_auth;
6100         uint8_t peer_supports_asconf;
6101         uint8_t peer_supports_asconf_ack;
6102         uint8_t peer_supports_reconfig;
6103         uint8_t peer_supports_nrsack;
6104         uint8_t peer_supports_pktdrop;
6105
6106 #ifdef INET
6107         struct sockaddr_in sin;
6108
6109 #endif
6110 #ifdef INET6
6111         struct sockaddr_in6 sin6;
6112
6113 #endif
6114
6115         /* First get the destination address setup too. */
6116 #ifdef INET
6117         memset(&sin, 0, sizeof(sin));
6118         sin.sin_family = AF_INET;
6119         sin.sin_len = sizeof(sin);
6120         sin.sin_port = stcb->rport;
6121 #endif
6122 #ifdef INET6
6123         memset(&sin6, 0, sizeof(sin6));
6124         sin6.sin6_family = AF_INET6;
6125         sin6.sin6_len = sizeof(struct sockaddr_in6);
6126         sin6.sin6_port = stcb->rport;
6127 #endif
6128         if (altsa) {
6129                 sa = altsa;
6130         } else {
6131                 sa = src;
6132         }
6133         peer_supports_ecn = 0;
6134         peer_supports_prsctp = 0;
6135         peer_supports_auth = 0;
6136         peer_supports_asconf = 0;
6137         peer_supports_asconf = 0;
6138         peer_supports_reconfig = 0;
6139         peer_supports_nrsack = 0;
6140         peer_supports_pktdrop = 0;
6141         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6142                 /* mark all addresses that we have currently on the list */
6143                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6144         }
6145         /* does the source address already exist? if so skip it */
6146         inp = stcb->sctp_ep;
6147         atomic_add_int(&stcb->asoc.refcnt, 1);
6148         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6149         atomic_add_int(&stcb->asoc.refcnt, -1);
6150
6151         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6152                 /* we must add the source address */
6153                 /* no scope set here since we have a tcb already. */
6154                 switch (sa->sa_family) {
6155 #ifdef INET
6156                 case AF_INET:
6157                         if (stcb->asoc.scope.ipv4_addr_legal) {
6158                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6159                                         return (-1);
6160                                 }
6161                         }
6162                         break;
6163 #endif
6164 #ifdef INET6
6165                 case AF_INET6:
6166                         if (stcb->asoc.scope.ipv6_addr_legal) {
6167                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6168                                         return (-2);
6169                                 }
6170                         }
6171                         break;
6172 #endif
6173                 default:
6174                         break;
6175                 }
6176         } else {
6177                 if (net_tmp != NULL && stcb_tmp == stcb) {
6178                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6179                 } else if (stcb_tmp != stcb) {
6180                         /* It belongs to another association? */
6181                         if (stcb_tmp)
6182                                 SCTP_TCB_UNLOCK(stcb_tmp);
6183                         return (-3);
6184                 }
6185         }
6186         if (stcb->asoc.state == 0) {
6187                 /* the assoc was freed? */
6188                 return (-4);
6189         }
6190         /* now we must go through each of the params. */
6191         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6192         while (phdr) {
6193                 ptype = ntohs(phdr->param_type);
6194                 plen = ntohs(phdr->param_length);
6195                 /*
6196                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6197                  * (uint32_t)ptype, (int)plen);
6198                  */
6199                 if (offset + plen > limit) {
6200                         break;
6201                 }
6202                 if (plen == 0) {
6203                         break;
6204                 }
6205 #ifdef INET
6206                 if (ptype == SCTP_IPV4_ADDRESS) {
6207                         if (stcb->asoc.scope.ipv4_addr_legal) {
6208                                 struct sctp_ipv4addr_param *p4, p4_buf;
6209
6210                                 /* ok get the v4 address and check/add */
6211                                 phdr = sctp_get_next_param(m, offset,
6212                                     (struct sctp_paramhdr *)&p4_buf,
6213                                     sizeof(p4_buf));
6214                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6215                                     phdr == NULL) {
6216                                         return (-5);
6217                                 }
6218                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6219                                 sin.sin_addr.s_addr = p4->addr;
6220                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6221                                         /* Skip multi-cast addresses */
6222                                         goto next_param;
6223                                 }
6224                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6225                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6226                                         goto next_param;
6227                                 }
6228                                 sa = (struct sockaddr *)&sin;
6229                                 inp = stcb->sctp_ep;
6230                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6231                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6232                                     dst, stcb);
6233                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6234
6235                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6236                                     inp == NULL) {
6237                                         /* we must add the source address */
6238                                         /*
6239                                          * no scope set since we have a tcb
6240                                          * already
6241                                          */
6242
6243                                         /*
6244                                          * we must validate the state again
6245                                          * here
6246                                          */
6247                         add_it_now:
6248                                         if (stcb->asoc.state == 0) {
6249                                                 /* the assoc was freed? */
6250                                                 return (-7);
6251                                         }
6252                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6253                                                 return (-8);
6254                                         }
6255                                 } else if (stcb_tmp == stcb) {
6256                                         if (stcb->asoc.state == 0) {
6257                                                 /* the assoc was freed? */
6258                                                 return (-10);
6259                                         }
6260                                         if (net != NULL) {
6261                                                 /* clear flag */
6262                                                 net->dest_state &=
6263                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6264                                         }
6265                                 } else {
6266                                         /*
6267                                          * strange, address is in another
6268                                          * assoc? straighten out locks.
6269                                          */
6270                                         if (stcb_tmp) {
6271                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6272                                                         /*
6273                                                          * in setup state we
6274                                                          * abort this guy
6275                                                          */
6276                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6277                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6278                                                         goto add_it_now;
6279                                                 }
6280                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6281                                         }
6282                                         if (stcb->asoc.state == 0) {
6283                                                 /* the assoc was freed? */
6284                                                 return (-12);
6285                                         }
6286                                         return (-13);
6287                                 }
6288                         }
6289                 } else
6290 #endif
6291 #ifdef INET6
6292                 if (ptype == SCTP_IPV6_ADDRESS) {
6293                         if (stcb->asoc.scope.ipv6_addr_legal) {
6294                                 /* ok get the v6 address and check/add */
6295                                 struct sctp_ipv6addr_param *p6, p6_buf;
6296
6297                                 phdr = sctp_get_next_param(m, offset,
6298                                     (struct sctp_paramhdr *)&p6_buf,
6299                                     sizeof(p6_buf));
6300                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6301                                     phdr == NULL) {
6302                                         return (-14);
6303                                 }
6304                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6305                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6306                                     sizeof(p6->addr));
6307                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6308                                         /* Skip multi-cast addresses */
6309                                         goto next_param;
6310                                 }
6311                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6312                                         /*
6313                                          * Link local make no sense without
6314                                          * scope
6315                                          */
6316                                         goto next_param;
6317                                 }
6318                                 sa = (struct sockaddr *)&sin6;
6319                                 inp = stcb->sctp_ep;
6320                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6321                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6322                                     dst, stcb);
6323                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6324                                 if (stcb_tmp == NULL &&
6325                                     (inp == stcb->sctp_ep || inp == NULL)) {
6326                                         /*
6327                                          * we must validate the state again
6328                                          * here
6329                                          */
6330                         add_it_now6:
6331                                         if (stcb->asoc.state == 0) {
6332                                                 /* the assoc was freed? */
6333                                                 return (-16);
6334                                         }
6335                                         /*
6336                                          * we must add the address, no scope
6337                                          * set
6338                                          */
6339                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6340                                                 return (-17);
6341                                         }
6342                                 } else if (stcb_tmp == stcb) {
6343                                         /*
6344                                          * we must validate the state again
6345                                          * here
6346                                          */
6347                                         if (stcb->asoc.state == 0) {
6348                                                 /* the assoc was freed? */
6349                                                 return (-19);
6350                                         }
6351                                         if (net != NULL) {
6352                                                 /* clear flag */
6353                                                 net->dest_state &=
6354                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6355                                         }
6356                                 } else {
6357                                         /*
6358                                          * strange, address is in another
6359                                          * assoc? straighten out locks.
6360                                          */
6361                                         if (stcb_tmp)
6362                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6363                                                         /*
6364                                                          * in setup state we
6365                                                          * abort this guy
6366                                                          */
6367                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6368                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6369                                                         goto add_it_now6;
6370                                                 }
6371                                         SCTP_TCB_UNLOCK(stcb_tmp);
6372
6373                                         if (stcb->asoc.state == 0) {
6374                                                 /* the assoc was freed? */
6375                                                 return (-21);
6376                                         }
6377                                         return (-22);
6378                                 }
6379                         }
6380                 } else
6381 #endif
6382                 if (ptype == SCTP_ECN_CAPABLE) {
6383                         peer_supports_ecn = 1;
6384                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6385                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6386                                 struct sctp_adaptation_layer_indication ai,
6387                                                                 *aip;
6388
6389                                 phdr = sctp_get_next_param(m, offset,
6390                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6391                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6392                                 if (aip) {
6393                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6394                                         stcb->asoc.adaptation_needed = 1;
6395                                 }
6396                         }
6397                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6398                         struct sctp_asconf_addr_param lstore, *fee;
6399                         int lptype;
6400                         struct sockaddr *lsa = NULL;
6401
6402 #ifdef INET
6403                         struct sctp_asconf_addrv4_param *fii;
6404
6405 #endif
6406
6407                         if (stcb->asoc.asconf_supported == 0) {
6408                                 return (-100);
6409                         }
6410                         if (plen > sizeof(lstore)) {
6411                                 return (-23);
6412                         }
6413                         phdr = sctp_get_next_param(m, offset,
6414                             (struct sctp_paramhdr *)&lstore,
6415                             min(plen, sizeof(lstore)));
6416                         if (phdr == NULL) {
6417                                 return (-24);
6418                         }
6419                         fee = (struct sctp_asconf_addr_param *)phdr;
6420                         lptype = ntohs(fee->addrp.ph.param_type);
6421                         switch (lptype) {
6422 #ifdef INET
6423                         case SCTP_IPV4_ADDRESS:
6424                                 if (plen !=
6425                                     sizeof(struct sctp_asconf_addrv4_param)) {
6426                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6427                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6428                                             plen);
6429                                 } else {
6430                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6431                                         sin.sin_addr.s_addr = fii->addrp.addr;
6432                                         lsa = (struct sockaddr *)&sin;
6433                                 }
6434                                 break;
6435 #endif
6436 #ifdef INET6
6437                         case SCTP_IPV6_ADDRESS:
6438                                 if (plen !=
6439                                     sizeof(struct sctp_asconf_addr_param)) {
6440                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6441                                             (int)sizeof(struct sctp_asconf_addr_param),
6442                                             plen);
6443                                 } else {
6444                                         memcpy(sin6.sin6_addr.s6_addr,
6445                                             fee->addrp.addr,
6446                                             sizeof(fee->addrp.addr));
6447                                         lsa = (struct sockaddr *)&sin6;
6448                                 }
6449                                 break;
6450 #endif
6451                         default:
6452                                 break;
6453                         }
6454                         if (lsa) {
6455                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6456                         }
6457                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6458                         stcb->asoc.peer_supports_nat = 1;
6459                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6460                         /* Peer supports pr-sctp */
6461                         peer_supports_prsctp = 1;
6462                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6463                         /* A supported extension chunk */
6464                         struct sctp_supported_chunk_types_param *pr_supported;
6465                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6466                         int num_ent, i;
6467
6468                         phdr = sctp_get_next_param(m, offset,
6469                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6470                         if (phdr == NULL) {
6471                                 return (-25);
6472                         }
6473                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6474                         num_ent = plen - sizeof(struct sctp_paramhdr);
6475                         for (i = 0; i < num_ent; i++) {
6476                                 switch (pr_supported->chunk_types[i]) {
6477                                 case SCTP_ASCONF:
6478                                         peer_supports_asconf = 1;
6479                                 case SCTP_ASCONF_ACK:
6480                                         peer_supports_asconf_ack = 1;
6481                                         break;
6482                                 case SCTP_FORWARD_CUM_TSN:
6483                                         peer_supports_prsctp = 1;
6484                                         break;
6485                                 case SCTP_PACKET_DROPPED:
6486                                         peer_supports_pktdrop = 1;
6487                                         break;
6488                                 case SCTP_NR_SELECTIVE_ACK:
6489                                         peer_supports_nrsack = 1;
6490                                         break;
6491                                 case SCTP_STREAM_RESET:
6492                                         peer_supports_reconfig = 1;
6493                                         break;
6494                                 case SCTP_AUTHENTICATION:
6495                                         peer_supports_auth = 1;
6496                                         break;
6497                                 default:
6498                                         /* one I have not learned yet */
6499                                         break;
6500
6501                                 }
6502                         }
6503                 } else if (ptype == SCTP_RANDOM) {
6504                         if (plen > sizeof(random_store))
6505                                 break;
6506                         if (got_random) {
6507                                 /* already processed a RANDOM */
6508                                 goto next_param;
6509                         }
6510                         phdr = sctp_get_next_param(m, offset,
6511                             (struct sctp_paramhdr *)random_store,
6512                             min(sizeof(random_store), plen));
6513                         if (phdr == NULL)
6514                                 return (-26);
6515                         p_random = (struct sctp_auth_random *)phdr;
6516                         random_len = plen - sizeof(*p_random);
6517                         /* enforce the random length */
6518                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6519                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6520                                 return (-27);
6521                         }
6522                         got_random = 1;
6523                 } else if (ptype == SCTP_HMAC_LIST) {
6524                         int num_hmacs;
6525                         int i;
6526
6527                         if (plen > sizeof(hmacs_store))
6528                                 break;
6529                         if (got_hmacs) {
6530                                 /* already processed a HMAC list */
6531                                 goto next_param;
6532                         }
6533                         phdr = sctp_get_next_param(m, offset,
6534                             (struct sctp_paramhdr *)hmacs_store,
6535                             min(plen, sizeof(hmacs_store)));
6536                         if (phdr == NULL)
6537                                 return (-28);
6538                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6539                         hmacs_len = plen - sizeof(*hmacs);
6540                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6541                         /* validate the hmac list */
6542                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6543                                 return (-29);
6544                         }
6545                         if (stcb->asoc.peer_hmacs != NULL)
6546                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6547                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6548                         if (stcb->asoc.peer_hmacs != NULL) {
6549                                 for (i = 0; i < num_hmacs; i++) {
6550                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6551                                             ntohs(hmacs->hmac_ids[i]));
6552                                 }
6553                         }
6554                         got_hmacs = 1;
6555                 } else if (ptype == SCTP_CHUNK_LIST) {
6556                         int i;
6557
6558                         if (plen > sizeof(chunks_store))
6559                                 break;
6560                         if (got_chklist) {
6561                                 /* already processed a Chunks list */
6562                                 goto next_param;
6563                         }
6564                         phdr = sctp_get_next_param(m, offset,
6565                             (struct sctp_paramhdr *)chunks_store,
6566                             min(plen, sizeof(chunks_store)));
6567                         if (phdr == NULL)
6568                                 return (-30);
6569                         chunks = (struct sctp_auth_chunk_list *)phdr;
6570                         num_chunks = plen - sizeof(*chunks);
6571                         if (stcb->asoc.peer_auth_chunks != NULL)
6572                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6573                         else
6574                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6575                         for (i = 0; i < num_chunks; i++) {
6576                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6577                                     stcb->asoc.peer_auth_chunks);
6578                                 /* record asconf/asconf-ack if listed */
6579                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6580                                         saw_asconf = 1;
6581                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6582                                         saw_asconf_ack = 1;
6583
6584                         }
6585                         got_chklist = 1;
6586                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6587                             (ptype == SCTP_STATE_COOKIE) ||
6588                             (ptype == SCTP_UNRECOG_PARAM) ||
6589                             (ptype == SCTP_COOKIE_PRESERVE) ||
6590                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6591                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6592                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6593                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6594                     (ptype == SCTP_SUCCESS_REPORT)) {
6595                          /* don't care */ ;
6596                 } else {
6597                         if ((ptype & 0x8000) == 0x0000) {
6598                                 /*
6599                                  * must stop processing the rest of the
6600                                  * param's. Any report bits were handled
6601                                  * with the call to
6602                                  * sctp_arethere_unrecognized_parameters()
6603                                  * when the INIT or INIT-ACK was first seen.
6604                                  */
6605                                 break;
6606                         }
6607                 }
6608
6609 next_param:
6610                 offset += SCTP_SIZE32(plen);
6611                 if (offset >= limit) {
6612                         break;
6613                 }
6614                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6615                     sizeof(parm_buf));
6616         }
6617         /* Now check to see if we need to purge any addresses */
6618         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6619                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6620                     SCTP_ADDR_NOT_IN_ASSOC) {
6621                         /* This address has been removed from the asoc */
6622                         /* remove and free it */
6623                         stcb->asoc.numnets--;
6624                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6625                         sctp_free_remote_addr(net);
6626                         if (net == stcb->asoc.primary_destination) {
6627                                 stcb->asoc.primary_destination = NULL;
6628                                 sctp_select_primary_destination(stcb);
6629                         }
6630                 }
6631         }
6632         if ((stcb->asoc.ecn_supported == 1) &&
6633             (peer_supports_ecn == 0)) {
6634                 stcb->asoc.ecn_supported = 0;
6635         }
6636         if ((stcb->asoc.prsctp_supported == 1) &&
6637             (peer_supports_prsctp == 0)) {
6638                 stcb->asoc.prsctp_supported = 0;
6639         }
6640         if ((stcb->asoc.auth_supported == 1) &&
6641             ((peer_supports_auth == 0) ||
6642             (got_random == 0) || (got_hmacs == 0))) {
6643                 stcb->asoc.auth_supported = 0;
6644         }
6645         if ((stcb->asoc.asconf_supported == 1) &&
6646             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6647             (stcb->asoc.auth_supported == 0) ||
6648             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6649                 stcb->asoc.asconf_supported = 0;
6650         }
6651         if ((stcb->asoc.reconfig_supported == 1) &&
6652             (peer_supports_reconfig == 0)) {
6653                 stcb->asoc.reconfig_supported = 0;
6654         }
6655         if ((stcb->asoc.nrsack_supported == 1) &&
6656             (peer_supports_nrsack == 0)) {
6657                 stcb->asoc.nrsack_supported = 0;
6658         }
6659         if ((stcb->asoc.pktdrop_supported == 1) &&
6660             (peer_supports_pktdrop == 0)) {
6661                 stcb->asoc.pktdrop_supported = 0;
6662         }
6663         /* validate authentication required parameters */
6664         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6665                 /* peer does not support auth but sent a chunks list? */
6666                 return (-31);
6667         }
6668         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6669                 /* peer supports asconf but not auth? */
6670                 return (-32);
6671         } else if ((peer_supports_asconf == 1) &&
6672                     (peer_supports_auth == 1) &&
6673             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6674                 return (-33);
6675         }
6676         /* concatenate the full random key */
6677         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6678         if (chunks != NULL) {
6679                 keylen += sizeof(*chunks) + num_chunks;
6680         }
6681         new_key = sctp_alloc_key(keylen);
6682         if (new_key != NULL) {
6683                 /* copy in the RANDOM */
6684                 if (p_random != NULL) {
6685                         keylen = sizeof(*p_random) + random_len;
6686                         bcopy(p_random, new_key->key, keylen);
6687                 }
6688                 /* append in the AUTH chunks */
6689                 if (chunks != NULL) {
6690                         bcopy(chunks, new_key->key + keylen,
6691                             sizeof(*chunks) + num_chunks);
6692                         keylen += sizeof(*chunks) + num_chunks;
6693                 }
6694                 /* append in the HMACs */
6695                 if (hmacs != NULL) {
6696                         bcopy(hmacs, new_key->key + keylen,
6697                             sizeof(*hmacs) + hmacs_len);
6698                 }
6699         } else {
6700                 /* failed to get memory for the key */
6701                 return (-34);
6702         }
6703         if (stcb->asoc.authinfo.peer_random != NULL)
6704                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6705         stcb->asoc.authinfo.peer_random = new_key;
6706         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6707         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6708
6709         return (0);
6710 }
6711
6712 int
6713 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6714     struct sctp_nets *net)
6715 {
6716         /* make sure the requested primary address exists in the assoc */
6717         if (net == NULL && sa)
6718                 net = sctp_findnet(stcb, sa);
6719
6720         if (net == NULL) {
6721                 /* didn't find the requested primary address! */
6722                 return (-1);
6723         } else {
6724                 /* set the primary address */
6725                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6726                         /* Must be confirmed, so queue to set */
6727                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6728                         return (0);
6729                 }
6730                 stcb->asoc.primary_destination = net;
6731                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6732                         sctp_free_remote_addr(stcb->asoc.alternate);
6733                         stcb->asoc.alternate = NULL;
6734                 }
6735                 net = TAILQ_FIRST(&stcb->asoc.nets);
6736                 if (net != stcb->asoc.primary_destination) {
6737                         /*
6738                          * first one on the list is NOT the primary
6739                          * sctp_cmpaddr() is much more efficient if the
6740                          * primary is the first on the list, make it so.
6741                          */
6742                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6743                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6744                 }
6745                 return (0);
6746         }
6747 }
6748
6749 int
6750 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6751 {
6752         /*
6753          * This function serves two purposes. It will see if a TAG can be
6754          * re-used and return 1 for yes it is ok and 0 for don't use that
6755          * tag. A secondary function it will do is purge out old tags that
6756          * can be removed.
6757          */
6758         struct sctpvtaghead *chain;
6759         struct sctp_tagblock *twait_block;
6760         struct sctpasochead *head;
6761         struct sctp_tcb *stcb;
6762         int i;
6763
6764         SCTP_INP_INFO_RLOCK();
6765         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6766             SCTP_BASE_INFO(hashasocmark))];
6767         if (head == NULL) {
6768                 /* invalid vtag */
6769                 goto skip_vtag_check;
6770         }
6771         LIST_FOREACH(stcb, head, sctp_asocs) {
6772                 /*
6773                  * We choose not to lock anything here. TCB's can't be
6774                  * removed since we have the read lock, so they can't be
6775                  * freed on us, same thing for the INP. I may be wrong with
6776                  * this assumption, but we will go with it for now :-)
6777                  */
6778                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6779                         continue;
6780                 }
6781                 if (stcb->asoc.my_vtag == tag) {
6782                         /* candidate */
6783                         if (stcb->rport != rport) {
6784                                 continue;
6785                         }
6786                         if (stcb->sctp_ep->sctp_lport != lport) {
6787                                 continue;
6788                         }
6789                         /* Its a used tag set */
6790                         SCTP_INP_INFO_RUNLOCK();
6791                         return (0);
6792                 }
6793         }
6794 skip_vtag_check:
6795
6796         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6797         /* Now what about timed wait ? */
6798         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6799                 /*
6800                  * Block(s) are present, lets see if we have this tag in the
6801                  * list
6802                  */
6803                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6804                         if (twait_block->vtag_block[i].v_tag == 0) {
6805                                 /* not used */
6806                                 continue;
6807                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6808                             now->tv_sec) {
6809                                 /* Audit expires this guy */
6810                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6811                                 twait_block->vtag_block[i].v_tag = 0;
6812                                 twait_block->vtag_block[i].lport = 0;
6813                                 twait_block->vtag_block[i].rport = 0;
6814                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6815                                     (twait_block->vtag_block[i].lport == lport) &&
6816                             (twait_block->vtag_block[i].rport == rport)) {
6817                                 /* Bad tag, sorry :< */
6818                                 SCTP_INP_INFO_RUNLOCK();
6819                                 return (0);
6820                         }
6821                 }
6822         }
6823         SCTP_INP_INFO_RUNLOCK();
6824         return (1);
6825 }
6826
6827 static void
6828 sctp_drain_mbufs(struct sctp_tcb *stcb)
6829 {
6830         /*
6831          * We must hunt this association for MBUF's past the cumack (i.e.
6832          * out of order data that we can renege on).
6833          */
6834         struct sctp_association *asoc;
6835         struct sctp_tmit_chunk *chk, *nchk;
6836         uint32_t cumulative_tsn_p1;
6837         struct sctp_queued_to_read *ctl, *nctl;
6838         int cnt, strmat;
6839         uint32_t gap, i;
6840         int fnd = 0;
6841
6842         /* We look for anything larger than the cum-ack + 1 */
6843
6844         asoc = &stcb->asoc;
6845         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6846                 /* none we can reneg on. */
6847                 return;
6848         }
6849         SCTP_STAT_INCR(sctps_protocol_drains_done);
6850         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6851         cnt = 0;
6852         /* First look in the re-assembly queue */
6853         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6854                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6855                         /* Yep it is above cum-ack */
6856                         cnt++;
6857                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6858                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6859                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6860                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6861                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6862                         if (chk->data) {
6863                                 sctp_m_freem(chk->data);
6864                                 chk->data = NULL;
6865                         }
6866                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6867                 }
6868         }
6869         /* Ok that was fun, now we will drain all the inbound streams? */
6870         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6871                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6872                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6873                                 /* Yep it is above cum-ack */
6874                                 cnt++;
6875                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6876                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6877                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6878                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6879                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6880                                 if (ctl->data) {
6881                                         sctp_m_freem(ctl->data);
6882                                         ctl->data = NULL;
6883                                 }
6884                                 sctp_free_remote_addr(ctl->whoFrom);
6885                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6886                                 SCTP_DECR_READQ_COUNT();
6887                         }
6888                 }
6889         }
6890         if (cnt) {
6891                 /* We must back down to see what the new highest is */
6892                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6893                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6894                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6895                                 asoc->highest_tsn_inside_map = i;
6896                                 fnd = 1;
6897                                 break;
6898                         }
6899                 }
6900                 if (!fnd) {
6901                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6902                 }
6903                 /*
6904                  * Question, should we go through the delivery queue? The
6905                  * only reason things are on here is the app not reading OR
6906                  * a p-d-api up. An attacker COULD send enough in to
6907                  * initiate the PD-API and then send a bunch of stuff to
6908                  * other streams... these would wind up on the delivery
6909                  * queue.. and then we would not get to them. But in order
6910                  * to do this I then have to back-track and un-deliver
6911                  * sequence numbers in streams.. el-yucko. I think for now
6912                  * we will NOT look at the delivery queue and leave it to be
6913                  * something to consider later. An alternative would be to
6914                  * abort the P-D-API with a notification and then deliver
6915                  * the data.... Or another method might be to keep track of
6916                  * how many times the situation occurs and if we see a
6917                  * possible attack underway just abort the association.
6918                  */
6919 #ifdef SCTP_DEBUG
6920                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6921 #endif
6922                 /*
6923                  * Now do we need to find a new
6924                  * asoc->highest_tsn_inside_map?
6925                  */
6926                 asoc->last_revoke_count = cnt;
6927                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6928                 /* sa_ignore NO_NULL_CHK */
6929                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6930                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6931         }
6932         /*
6933          * Another issue, in un-setting the TSN's in the mapping array we
6934          * DID NOT adjust the highest_tsn marker.  This will cause one of
6935          * two things to occur. It may cause us to do extra work in checking
6936          * for our mapping array movement. More importantly it may cause us
6937          * to SACK every datagram. This may not be a bad thing though since
6938          * we will recover once we get our cum-ack above and all this stuff
6939          * we dumped recovered.
6940          */
6941 }
6942
6943 void
6944 sctp_drain()
6945 {
6946         /*
6947          * We must walk the PCB lists for ALL associations here. The system
6948          * is LOW on MBUF's and needs help. This is where reneging will
6949          * occur. We really hope this does NOT happen!
6950          */
6951         VNET_ITERATOR_DECL(vnet_iter);
6952         VNET_LIST_RLOCK_NOSLEEP();
6953         VNET_FOREACH(vnet_iter) {
6954                 CURVNET_SET(vnet_iter);
6955                 struct sctp_inpcb *inp;
6956                 struct sctp_tcb *stcb;
6957
6958                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6959                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6960 #ifdef VIMAGE
6961                         continue;
6962 #else
6963                         return;
6964 #endif
6965                 }
6966                 SCTP_INP_INFO_RLOCK();
6967                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6968                         /* For each endpoint */
6969                         SCTP_INP_RLOCK(inp);
6970                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6971                                 /* For each association */
6972                                 SCTP_TCB_LOCK(stcb);
6973                                 sctp_drain_mbufs(stcb);
6974                                 SCTP_TCB_UNLOCK(stcb);
6975                         }
6976                         SCTP_INP_RUNLOCK(inp);
6977                 }
6978                 SCTP_INP_INFO_RUNLOCK();
6979                 CURVNET_RESTORE();
6980         }
6981         VNET_LIST_RUNLOCK_NOSLEEP();
6982 }
6983
6984 /*
6985  * start a new iterator
6986  * iterates through all endpoints and associations based on the pcb_state
6987  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6988  * assocs and "ef" (optional) is executed when the iterator completes.
6989  * "inpf" (optional) is executed for each new endpoint as it is being
6990  * iterated through. inpe (optional) is called when the inp completes
6991  * its way through all the stcbs.
6992  */
6993 int
6994 sctp_initiate_iterator(inp_func inpf,
6995     asoc_func af,
6996     inp_func inpe,
6997     uint32_t pcb_state,
6998     uint32_t pcb_features,
6999     uint32_t asoc_state,
7000     void *argp,
7001     uint32_t argi,
7002     end_func ef,
7003     struct sctp_inpcb *s_inp,
7004     uint8_t chunk_output_off)
7005 {
7006         struct sctp_iterator *it = NULL;
7007
7008         if (af == NULL) {
7009                 return (-1);
7010         }
7011         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7012             SCTP_M_ITER);
7013         if (it == NULL) {
7014                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7015                 return (ENOMEM);
7016         }
7017         memset(it, 0, sizeof(*it));
7018         it->function_assoc = af;
7019         it->function_inp = inpf;
7020         if (inpf)
7021                 it->done_current_ep = 0;
7022         else
7023                 it->done_current_ep = 1;
7024         it->function_atend = ef;
7025         it->pointer = argp;
7026         it->val = argi;
7027         it->pcb_flags = pcb_state;
7028         it->pcb_features = pcb_features;
7029         it->asoc_state = asoc_state;
7030         it->function_inp_end = inpe;
7031         it->no_chunk_output = chunk_output_off;
7032         it->vn = curvnet;
7033         if (s_inp) {
7034                 /* Assume lock is held here */
7035                 it->inp = s_inp;
7036                 SCTP_INP_INCR_REF(it->inp);
7037                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7038         } else {
7039                 SCTP_INP_INFO_RLOCK();
7040                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7041                 if (it->inp) {
7042                         SCTP_INP_INCR_REF(it->inp);
7043                 }
7044                 SCTP_INP_INFO_RUNLOCK();
7045                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7046
7047         }
7048         SCTP_IPI_ITERATOR_WQ_LOCK();
7049
7050         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7051         if (sctp_it_ctl.iterator_running == 0) {
7052                 sctp_wakeup_iterator();
7053         }
7054         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7055         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7056         return (0);
7057 }